In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix unconditional security_locked_down() call Currently, the lockdown state is queried unconditionally, even though its result is used only if the PERF_SAMPLE_REGS_INTR bit is set in attr.sample_type. While that doesn't matter in case of the Lockdown LSM, it causes trouble with the SELinux's lockdown hook implementation. SELinux implements the locked_down hook with a check whether the current task's type has the corresponding "lockdown" class permission ("integrity" or "confidentiality") allowed in the policy. This means that calling the hook when the access control decision would be ignored generates a bogus permission check and audit record. Fix this by checking sample_type first and only calling the hook when its result would be honored.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix unconditional     security_locked_down() call Currently, the lockdown state is queried unconditionally, even though its     result is used only if the PERF_SAMPLE_REGS_INTR bit is set in attr.sample_type. While that doesn't matter     in case of the Lockdown LSM, it causes trouble with the SELinux's lockdown hook implementation. SELinux     implements the locked_down hook with a check whether the current task's type has the corresponding     lockdown class permission (integrity or confidentiality) allowed in the policy. This means that     calling the hook when the access control decision would be ignored generates a bogus permission check and     audit record. Fix this by checking sample_type first and only calling the hook when its result would be     honored. (CVE-2021-46971)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1454-1 advisory.

    The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various security bugfixes.

    The following security bugs were fixed:

    - CVE-2020-36780: Fixed a reference leak when pm_runtime_get_sync fails in i2c (bsc#1220556).
    - CVE-2020-36782: Fixed a reference leak when pm_runtime_get_sync fails in i2c imx-lpi2c (bsc#1220560).
    - CVE-2020-36783: Fixed a reference leak when pm_runtime_get_sync fails in i2c img-scb (bsc#1220561).
    - CVE-2021-23134: Fixed a use-after-free issue in nfc sockets (bsc#1186060).
    - CVE-2021-46909: Fixed a PCI interrupt mapping in ARM footbridge (bsc#1220442).
    - CVE-2021-46921: Fixed ordering in queued_write_lock_slowpath (bsc#1220468).
    - CVE-2021-46930: Fixed a list_head check warning caused by uninitialization of list_head in usb mtu3     (bsc#1220484).
    - CVE-2021-46938: Fixed a double free of blk_mq_tag_set in dev remove after table load fails in dm rq     (bsc#1220554).
    - CVE-2021-46939: Fixed a denial of service in trace_clock_global() in tracing (bsc#1220580).
    - CVE-2021-46943: Fixed an oops in set_fmt error handling in media: staging/intel-ipu3 (bsc#1220583).
    - CVE-2021-46944: Fixed a memory leak in imu_fmt in media staging/intel-ipu3 (bsc#1220566).
    - CVE-2021-46950: Fixed a data corruption bug in raid1 arrays using bitmaps in md/raid1 (bsc#1220662).
    - CVE-2021-46951: Fixed an integer underflow of efi_tpm_final_log_size in tpm_read_log_efi in tpm efi     (bsc#1220615).
    - CVE-2021-46958: Fixed a race between transaction aborts and fsyncs leading to use-after-free in btrfs     (bsc#1220521).
    - CVE-2021-46960: Fixed a warning on smb2_get_enc_key in cifs (bsc#1220528).
    - CVE-2021-46961: Fixed an error on not enabling irqs when handling spurious interrups in irqchip/gic-v3     (bsc#1220529).
    - CVE-2021-46962: Fixed a resource leak in the remove function in mmc uniphier-sd (bsc#1220532).
    - CVE-2021-46963: Fixed a denial of service in qla2xxx_mqueuecommand() in scsi qla2xxx (bsc#1220536)
    - CVE-2021-46971: Fixed unconditional security_locked_down() call in perf/core (bsc#1220697).
    - CVE-2021-46981: Fixed a NULL pointer in flush_workqueue in nbd (bsc#1220611).
    - CVE-2021-46984: Fixed an out of bounds access in kyber_bio_merge() in kyber (bsc#1220631).
    - CVE-2021-46988: Fixed release page in error path to avoid BUG_ON in userfaultfd (bsc#1220706).
    - CVE-2021-46990: Fixed a denial of service when toggling entry flush barrier in powerpc/64s     (bsc#1220743).
    - CVE-2021-46991: Fixed a use-after-free in i40e_client_subtask (bsc#1220575).
    - CVE-2021-46992: Fixed a bug to avoid overflows in nft_hash_buckets (bsc#1220638).
    - CVE-2021-46998: Fixed an use after free bug in enic_hard_start_xmit in ethernet/enic (bsc#1220625).
    - CVE-2021-47000: Fixed an inode leak on getattr error in __fh_to_dentry in ceph (bsc#1220669).
    - CVE-2021-47006: Fixed wrong check in overflow_handler hook in ARM 9064/1 hw_breakpoint (bsc#1220751).
    - CVE-2021-47013: Fixed a use after free in emac_mac_tx_buf_send (bsc#1220641).
    - CVE-2021-47015: Fixed a RX consumer index logic in the error path in bnxt_rx_pkt() in bnxt_en     (bsc#1220794).
    - CVE-2021-47020: Fixed a memory leak in stream config error path in soundwire stream (bsc#1220785).
    - CVE-2021-47034: Fixed a kernel memory fault for pte update on radix in powerpc/64s (bsc#1220687).
    - CVE-2021-47045: Fixed a null pointer dereference in lpfc_prep_els_iocb() in scsi lpfc (bsc#1220640).
    - CVE-2021-47049: Fixed an after free in __vmbus_open() in hv vmbus (bsc#1220692).
    - CVE-2021-47051: Fixed a PM reference leak in lpspi_prepare_xfer_hardware() in spi fsl-lpspi     (bsc#1220764).
    - CVE-2021-47055: Fixed missing permissions for locking and badblock ioctls in mtd (bsc#1220768).
    - CVE-2021-47056: Fixed a user-memory-access error on vf2pf_lock in crypto (bsc#1220769).
    - CVE-2021-47058: Fixed a possible user-after-free in set debugfs_name in regmap (bsc#1220779).
    - CVE-2021-47061: Fixed a bug in KVM by destroy I/O bus devices on unregister failure _after_  sync'ing     SRCU (bsc#1220745).
    - CVE-2021-47063: Fixed a potential use-after-free during bridge detach in drm bridge/panel (bsc#1220777).
    - CVE-2021-47065: Fixed an array overrun in rtw_get_tx_power_params() in rtw88 (bsc#1220749).
    - CVE-2021-47068: Fixed a use-after-free issue in llcp_sock_bind/connect (bsc#1220739).
    - CVE-2021-47069: Fixed a crash due to relying on a stack reference past its expiry in ipc/mqueue,     ipc/msg, ipc/sem (bsc#1220826).
    - CVE-2021-47070: Fixed a memory leak in error handling paths on memory allocated by vmbus_alloc_ring in     uio_hv_generic (bsc#1220829).
    - CVE-2021-47071: Fixed a memory leak in error handling paths in hv_uio_cleanup() in uio_hv_generic     (bsc#1220846).
    - CVE-2021-47073: Fixed a oops on rmmod dell_smbios exit_dell_smbios_wmi() in platform/x86 dell-smbios-wmi     (bsc#1220850).
    - CVE-2021-47077: Fixed a NULL pointer dereference when in shost_data (bsc#1220861).
    - CVE-2021-47082: Fixed a double free in tun_free_netdev in tun (bsc#1220969).
    - CVE-2021-47109: Fixed an overflow in neighbour table in neighbour (bsc#1221534).
    - CVE-2021-47110: Fixed possible memory corruption when restoring from hibernation in x86/kvm     (bsc#1221532).
    - CVE-2021-47112: Fixed possible memory corruption when restoring from hibernation in x86/kvm     (bsc#1221541).
    - CVE-2021-47114: Fixed a data corruption by fallocate in ocfs2 (bsc#1221548).
    - CVE-2021-47117: Fixed a crash in ext4_es_cache_extent as ext4_split_extent_at failed in ext4     (bsc#1221575).
    - CVE-2021-47118: Fixed an use-after-free in init task's struct pid in pid (bsc#1221605).
    - CVE-2021-47119: Fixed a memory leak in ext4_fill_super in ext4 (bsc#1221608).
    - CVE-2021-47120: Fixed a NULL pointer dereference on disconnect in HID magicmouse (bsc#1221606).
    - CVE-2021-47138: Fixed an out-of-bound memory access during clearing filters in cxgb4 (bsc#1221934).
    - CVE-2021-47139: Fixed a race condition that lead to oops in netdevice registration in net hns3     (bsc#1221935).
    - CVE-2021-47141: Fixed a null pointer dereference on priv->msix_vectors when driver is unloaded in gve     (bsc#1221949).
    - CVE-2021-47142: Fixed an use-after-free on ttm->sg in drm/amdgpu (bsc#1221952).
    - CVE-2021-47144: Fixed a refcount leak in amdgpufb_create in drm/amd/amdgpu (bsc#1221989).
    - CVE-2021-47153: Fixed an out-of-range memory access during bus reset in the case of a block transaction     in i2c/i801 (bsc#1221969).
    - CVE-2021-47161: Fixed a resource leak in an error handling path in the error handling path of the probe     function in spi spi-fsl-dspi (bsc#1221966).
    - CVE-2021-47165: Fixed a NULL pointer dereference when component was not probed during shutdown in     drm/mesonhe (bsc#1221965).
    - CVE-2021-47166: Fixed a data corruption of pg_bytes_written in nfs_do_recoalesce() in nfs (bsc#1221998).
    - CVE-2021-47167: Fixed an oopsable condition in __nfs_pageio_add_request() in nfs (bsc#1221991).
    - CVE-2021-47168: Fixed an incorrect limit in filelayout_decode_layout() in nfs (bsc#1222002).
    - CVE-2021-47169: Fixed a NULL pointer dereference in rp2_probe in serial rp2 (bsc#1222000).
    - CVE-2021-47170: Fixed a WARN about excessively large memory allocations in usb usbfs (bsc#1222004).
    - CVE-2021-47171: Fixed a memory leak in smsc75xx_bind in net usb (bsc#1221994).
    - CVE-2021-47172: Fixed a potential overflow due to non sequential channel numbers in adc/ad7124     (bsc#1221992).
    - CVE-2021-47173: Fixed a memory leak in uss720_probe in misc/uss720 (bsc#1221993).
    - CVE-2021-47177: Fixed a sysfs leak in alloc_iommu() in iommu/vt-d (bsc#1221997).
    - CVE-2021-47179: Fixed a NULL pointer dereference in pnfs_mark_matching_lsegs_return() in nfsv4     (bsc#1222001).
    - CVE-2021-47180: Fixed a memory leak in nci_allocate_device nfcmrvl_disconnect in nfc nci (bsc#1221999).
    - CVE-2021-47181: Fixed a null pointer dereference caused by calling platform_get_resource()     (bsc#1222660).
    - CVE-2021-47183: Fixed a null pointer dereference during link down processing in scsi lpfc (bsc#1192145,     bsc#1222664).
    - CVE-2021-47185: Fixed a softlockup issue in flush_to_ldisc in tty tty_buffer (bsc#1222669).
    - CVE-2021-47189: Fixed denial of service due to memory ordering issues between normal and ordered work     functions in btrfs (bsc#1222706).
    - CVE-2022-0487: Fixed an use-after-free vulnerability in rtsx_usb_ms_drv_remove() in     drivers/memstick/host/rtsx_usb_ms.c (bsc#1194516).
    - CVE-2022-4744: Fixed a double-free that could lead to DoS or privilege escalation in TUN/TAP device     driver functionality (bsc#1209635).
    - CVE-2022-48626: Fixed a potential use-after-free on remove path in moxart (bsc#1220366).
    - CVE-2023-0160: Fixed deadlock flaw in BPF that could allow a local user to potentially crash the system     (bsc#1209657).
    - CVE-2023-1192: Fixed use-after-free in cifs_demultiplex_thread() (bsc#1208995).
    - CVE-2023-28746: Fixed Register File Data Sampling (bsc#1213456).
    - CVE-2023-35827: Fixed a use-after-free issue in ravb_tx_timeout_work() (bsc#1212514).
    - CVE-2023-52454: Fixed a kernel panic when host sends an invalid H2C PDU length in nvmet-tcp     (bsc#1220320).
    - CVE-2023-52469: Fixed an use-after-free in kv_parse_power_table in drivers/amd/pm (bsc#1220411).
    - CVE-2023-52470: Fixed null-ptr-deref in radeon_crtc_init() (bsc#1220413).
    - CVE-2023-52474: Fixed a data corruption in user SDMA requests in IB/hfi1 (bsc#1220445).
    - CVE-2023-52476: Fixed possible unhandled page fault via perf sampling NMI during vsyscall (bsc#1220703).
    - CVE-2023-52477: Fixed USB Hub accesses to uninitialized BOS descriptors (bsc#1220790).
    - CVE-2023-52500: Fixed information leaking when processing OPC_INB_SET_CONTROLLER_CONFIG command     (bsc#1220883).
    - CVE-2023-52500: Fixed leaking tags when processing  OPC_INB_SET_CONTROLLER_CONFIG command in scsi in     pm80xx (bsc#1220883).
    - CVE-2023-52509: Fixed a use-after-free issue in ravb_tx_timeout_work() (bsc#1220836).
    - CVE-2023-52572: Fixed UAF in cifs_demultiplex_thread() in cifs (bsc#1220946).
    - CVE-2023-52575: Fixed SBPB enablement for spec_rstack_overflow=off (bsc#1220871).
    - CVE-2023-52583: Fixed deadlock or deadcode of misusing dget() inside ceph (bsc#1221058).
    - CVE-2023-52590: Fixed a possible ocfs2 filesystem corruption via directory renaming (bsc#1221088).
    - CVE-2023-52591: Fixed a possible reiserfs filesystem corruption via directory renaming (bsc#1221044).
    - CVE-2023-52607: Fixed null-pointer dereference in pgtable_cache_add kasprintf() in powerpc/mm     (bsc#1221061).
    - CVE-2023-52628: Fixed 4-byte stack OOB write in nftables (bsc#1222117).
    - CVE-2023-6270: Fixed a use-after-free issue in aoecmd_cfg_pkts (bsc#1218562).
    - CVE-2023-6356: Fixed a NULL pointer dereference in nvmet_tcp_build_pdu_iovec (bsc#1217987).
    - CVE-2023-6531: Fixed a use-after-free flaw due to a race problem in the unix garbage collector's     deletion of SKB races (bsc#1218447).
    - CVE-2023-6535: Fixed a NULL pointer dereference in nvmet_tcp_execute_request (bsc#1217988).
    - CVE-2023-6536: Fixed a NULL pointer dereference in __nvmet_req_complete (bsc#1217989).
    - CVE-2023-7042: Fixed a null pointer dereference in ath10k_wmi_tlv_op_pull_mgmt_tx_compl_ev() in     drivers/net/wireless/ath/ath10k/wmi-tlv.c in net (bsc#1218336).
    - CVE-2023-7192: Fixed a memory leak problem in ctnetlink_create_conntrack in     net/netfilter/nf_conntrack_netlink.c (bsc#1218479).
    - CVE-2024-22099: Fixed a null pointer dereference in /net/bluetooth/rfcomm/core.C in bluetooth     (bsc#1219170).
    - CVE-2024-26600: Fixed null pointer dereference for SRP in phy-omap-usb2 (bsc#1220340).
    - CVE-2024-26614: Fixed the initialization of accept_queue's spinlocks (bsc#1221293).
    - CVE-2024-26642: Fixed the set of anonymous timeout flag in netfilter nf_tables (bsc#1221830).
    - CVE-2024-26704: Fixed a double-free of blocks due to wrong extents moved_len in ext4 (bsc#1222422).
    - CVE-2024-26733: Fixed an overflow in arp_req_get() in arp (bsc#1222585).


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.10.35-31.135. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2022-001 advisory.

    2024-05-23: CVE-2021-46972 was added to this advisory.

    2024-05-23: CVE-2021-46974 was added to this advisory.

    2024-05-23: CVE-2021-46909 was added to this advisory.

    2024-04-25: CVE-2021-46922 was added to this advisory.

    2024-04-25: CVE-2021-46912 was added to this advisory.

    2024-04-25: CVE-2021-46908 was added to this advisory.

    2024-04-25: CVE-2021-46914 was added to this advisory.

    2024-04-25: CVE-2021-46971 was added to this advisory.

    2024-03-13: CVE-2021-46915 was added to this advisory.

    2024-03-13: CVE-2021-46904 was added to this advisory.

    2024-03-13: CVE-2021-46905 was added to this advisory.

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     performs manipulation with an unknown input for the llcp_sock_bind() function. This flaw allows a local     user to crash or escalate their privileges on the system. (CVE-2020-25670)

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     triggers the llcp_sock_connect() function. This flaw allows a local user to crash the system.
    (CVE-2020-25671)

    A memory leak in the Linux kernel's NFC LLCP protocol implementation was found in the way a user triggers     the llcp_sock_connect() function. This flaw allows a local user to starve the resources, causing a denial     of service. (CVE-2020-25672)

    A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

    A use-after-free flaw was found in the Linux kernel's SCTP socket functionality that triggers a race     condition. This flaw allows a local user to escalate their privileges on the system. The highest threat     from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-23133)

    A vulnerability was discovered in retrieve_ptr_limit in kernel/bpf/verifier.c in the Linux kernel     mechanism to mitigate speculatively out-of-bounds loads (Spectre mitigation). In this flaw a local,     special user privileged (CAP_SYS_ADMIN) BPF program running on affected systems may bypass the protection,     and execute speculatively out-of-bounds loads from the kernel memory. This can be abused to extract     contents of kernel memory via side-channel. (CVE-2021-29155)

    A flaw was found in the Linux kernel's eBPF verification code. By default, accessing the eBPF verifier is     only accessible to privileged users with CAP_SYS_ADMIN. This flaw allows a local user who can insert eBPF     instructions, to use the eBPF verifier to abuse a spectre-like flaw and infer all system memory. The     highest threat from this vulnerability is to confidentiality. (CVE-2021-31829)

    The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size     was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel     and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny     reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier     support for it) (v5.8-rc1). (CVE-2021-3489)

    The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly     update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and     therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (bpf: Fix alu32 const     subreg bound tracking on bitwise operations) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (bpf: Verifier, do     explicit ALU32 bounds tracking) (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (bpf:Fix a     verifier failure with xor) ( 5.10-rc1). (CVE-2021-3490)

    A flaw was found in the Linux kernel.  The io_uring PROVIDE_BUFFERS operation allowed the MAX_RW_COUNT     limit to be bypassed, which led to negative values being used in mem_rw when reading /proc/<PID>/mem. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability. (CVE-2021-3491)

    A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API,     is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-     of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.
    (CVE-2021-3501)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix null-ptr-deref during tty device unregistration

    Multiple ttys try to claim the same the minor number causing a doubleunregistration of the same device.
    The first unregistration succeedsbut the next one results in a null-ptr-deref.

    The get_free_serial_index() function returns an available minor numberbut doesn't assign it immediately.
    The assignment is done by the callerlater. But before this assignment, calls to     get_free_serial_index()would return the same minor number.

    Fix this by modifying get_free_serial_index to assign the minor numberimmediately after one is found to be     and rename it to obtain_minor()to better reflect what it does. Similary, rename set_serial_by_index()to     release_minor() and modify it to free up the minor number of thegiven hso_serial. Every obtain_minor()     should have correspondingrelease_minor() call. (CVE-2021-46904)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix NULL-deref on disconnect regression

    Commit 8a12f8836145 (net: hso: fix null-ptr-deref during tty deviceunregistration) fixed the racy minor     allocation reported by syzbot, butintroduced an unconditional NULL-pointer dereference on every     disconnectinstead.

    Specifically, the serial device table must no longer be accessed afterthe minor has been released by     hso_serial_tty_unregister(). (CVE-2021-46905)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Use correct permission flag for mixed signed bounds arithmetic

    We forbid adding unknown scalars with mixed signed bounds due to thespectre v1 masking mitigation. Hence     this also needs bypass_spec_v1flag instead of allow_ptr_leaks. (CVE-2021-46908)

    In the Linux kernel, the following vulnerability has been resolved:

    ARM: footbridge: fix PCI interrupt mapping (CVE-2021-46909)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Make tcp_allowed_congestion_control readonly in non-init netns (CVE-2021-46912)

    In the Linux kernel, the following vulnerability has been resolved:

    ixgbe: fix unbalanced device enable/disable in suspend/resume (CVE-2021-46914)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_limit: avoid possible divide error in nft_limit_init

    div_u64() divides u64 by u32.

    nft_limit_init() wants to divide u64 by u64, use the appropriatemath function (div64_u64)

    divide error: 0000 [#1] PREEMPT SMP KASANCPU: 1 PID: 8390 Comm: syz-executor188 Not tainted     5.12.0-rc4-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google     01/01/2011RIP: 0010:div_u64_rem include/linux/math64.h:28 [inline]RIP: 0010:div_u64     include/linux/math64.h:127 [inline]RIP: 0010:nft_limit_init+0x2a2/0x5e0 net/netfilter/nft_limit.c:85Code:
    ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45     89 ed 31 d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00RSP:
    0018:ffffc90009447198 EFLAGS: 00010246RAX: 0000000000000000 RBX: 0000200000000000 RCX:
    0000000000000000RDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003RBP: ffff888020f80908     R08: 0000200000000000 R09: 0000000000000000R10: ffffffff875152d8 R11: 0000000000000000 R12:
    ffffc90009447270R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000FS:
    000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0:
    0000000080050033CR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0DR0: 0000000000000000     DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
    0000000000000400Call Trace:nf_tables_newexpr net/netfilter/nf_tables_api.c:2675     [inline]nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2713nft_set_elem_expr_alloc+0x27/0x280     net/netfilter/nf_tables_api.c:5160nf_tables_newset+0x1997/0x3150     net/netfilter/nf_tables_api.c:4321nfnetlink_rcv_batch+0x85a/0x21b0     net/netfilter/nfnetlink.c:456nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580     [inline]nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:598netlink_unicast_kernel     net/netlink/af_netlink.c:1312 [inline]netlink_unicast+0x533/0x7d0     net/netlink/af_netlink.c:1338netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927sock_sendmsg_nosec     net/socket.c:654 [inline]sock_sendmsg+0xcf/0x120 net/socket.c:674____sys_sendmsg+0x6e8/0x810     net/socket.c:2350___sys_sendmsg+0xf3/0x170 net/socket.c:2404__sys_sendmsg+0xe5/0x1b0     net/socket.c:2433do_syscall_64+0x2d/0x70     arch/x86/entry/common.c:46entry_SYSCALL_64_after_hwframe+0x44/0xae (CVE-2021-46915)

    In the Linux kernel, the following vulnerability has been resolved:

    KEYS: trusted: Fix TPM reservation for seal/unseal (CVE-2021-46922)

    In the Linux kernel, the following vulnerability has been resolved:

    perf/core: Fix unconditional security_locked_down() call (CVE-2021-46971)

    In the Linux kernel, the following vulnerability has been resolved:

    ovl: fix leaked dentry (CVE-2021-46972)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix masking negation logic upon negative dst register (CVE-2021-46974)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.4.117-58.216. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-003 advisory.

    2024-05-23: CVE-2021-46974 was added to this advisory.

    2024-05-23: CVE-2021-46909 was added to this advisory.

    2024-04-25: CVE-2021-46971 was added to this advisory.

    2024-03-13: CVE-2021-46915 was added to this advisory.

    2024-03-13: CVE-2021-46904 was added to this advisory.

    2024-03-13: CVE-2021-46905 was added to this advisory.

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     performs manipulation with an unknown input for the llcp_sock_bind() function. This flaw allows a local     user to crash or escalate their privileges on the system. (CVE-2020-25670)

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     triggers the llcp_sock_connect() function. This flaw allows a local user to crash the system.
    (CVE-2020-25671)

    A memory leak in the Linux kernel's NFC LLCP protocol implementation was found in the way a user triggers     the llcp_sock_connect() function. This flaw allows a local user to starve the resources, causing a denial     of service. (CVE-2020-25672)

    A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

    A use-after-free flaw was found in the Linux kernel's SCTP socket functionality that triggers a race     condition. This flaw allows a local user to escalate their privileges on the system. The highest threat     from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-23133)

    A flaw was found in the Linux kernels eBPF implementation. By default, accessing the eBPF verifier is only     accessible to privileged users with CAP_SYS_ADMIN.   A local user with the ability to insert eBPF     instructions can abuse a flaw in eBPF to corrupt memory. The highest threat from this vulnerability is to     confidentiality, integrity, as well as system availability. (CVE-2021-29154)

    A vulnerability was discovered in retrieve_ptr_limit in kernel/bpf/verifier.c in the Linux kernel     mechanism to mitigate speculatively out-of-bounds loads (Spectre mitigation). In this flaw a local,     special user privileged (CAP_SYS_ADMIN) BPF program running on affected systems may bypass the protection,     and execute speculatively out-of-bounds loads from the kernel memory. This can be abused to extract     contents of kernel memory via side-channel. (CVE-2021-29155)

    A flaw was found in the Linux kernel's eBPF verification code. By default, accessing the eBPF verifier is     only accessible to privileged users with CAP_SYS_ADMIN. This flaw allows a local user who can insert eBPF     instructions, to use the eBPF verifier to abuse a spectre-like flaw and infer all system memory. The     highest threat from this vulnerability is to confidentiality. (CVE-2021-31829)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix null-ptr-deref during tty device unregistration

    Multiple ttys try to claim the same the minor number causing a doubleunregistration of the same device.
    The first unregistration succeedsbut the next one results in a null-ptr-deref.

    The get_free_serial_index() function returns an available minor numberbut doesn't assign it immediately.
    The assignment is done by the callerlater. But before this assignment, calls to     get_free_serial_index()would return the same minor number.

    Fix this by modifying get_free_serial_index to assign the minor numberimmediately after one is found to be     and rename it to obtain_minor()to better reflect what it does. Similary, rename set_serial_by_index()to     release_minor() and modify it to free up the minor number of thegiven hso_serial. Every obtain_minor()     should have correspondingrelease_minor() call. (CVE-2021-46904)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix NULL-deref on disconnect regression

    Commit 8a12f8836145 (net: hso: fix null-ptr-deref during tty deviceunregistration) fixed the racy minor     allocation reported by syzbot, butintroduced an unconditional NULL-pointer dereference on every     disconnectinstead.

    Specifically, the serial device table must no longer be accessed afterthe minor has been released by     hso_serial_tty_unregister(). (CVE-2021-46905)

    In the Linux kernel, the following vulnerability has been resolved:

    ARM: footbridge: fix PCI interrupt mapping (CVE-2021-46909)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_limit: avoid possible divide error in nft_limit_init

    div_u64() divides u64 by u32.

    nft_limit_init() wants to divide u64 by u64, use the appropriatemath function (div64_u64)

    divide error: 0000 [#1] PREEMPT SMP KASANCPU: 1 PID: 8390 Comm: syz-executor188 Not tainted     5.12.0-rc4-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google     01/01/2011RIP: 0010:div_u64_rem include/linux/math64.h:28 [inline]RIP: 0010:div_u64     include/linux/math64.h:127 [inline]RIP: 0010:nft_limit_init+0x2a2/0x5e0 net/netfilter/nft_limit.c:85Code:
    ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45     89 ed 31 d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00RSP:
    0018:ffffc90009447198 EFLAGS: 00010246RAX: 0000000000000000 RBX: 0000200000000000 RCX:
    0000000000000000RDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003RBP: ffff888020f80908     R08: 0000200000000000 R09: 0000000000000000R10: ffffffff875152d8 R11: 0000000000000000 R12:
    ffffc90009447270R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000FS:
    000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0:
    0000000080050033CR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0DR0: 0000000000000000     DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
    0000000000000400Call Trace:nf_tables_newexpr net/netfilter/nf_tables_api.c:2675     [inline]nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2713nft_set_elem_expr_alloc+0x27/0x280     net/netfilter/nf_tables_api.c:5160nf_tables_newset+0x1997/0x3150     net/netfilter/nf_tables_api.c:4321nfnetlink_rcv_batch+0x85a/0x21b0     net/netfilter/nfnetlink.c:456nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580     [inline]nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:598netlink_unicast_kernel     net/netlink/af_netlink.c:1312 [inline]netlink_unicast+0x533/0x7d0     net/netlink/af_netlink.c:1338netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927sock_sendmsg_nosec     net/socket.c:654 [inline]sock_sendmsg+0xcf/0x120 net/socket.c:674____sys_sendmsg+0x6e8/0x810     net/socket.c:2350___sys_sendmsg+0xf3/0x170 net/socket.c:2404__sys_sendmsg+0xe5/0x1b0     net/socket.c:2433do_syscall_64+0x2d/0x70     arch/x86/entry/common.c:46entry_SYSCALL_64_after_hwframe+0x44/0xae (CVE-2021-46915)

    In the Linux kernel, the following vulnerability has been resolved:

    perf/core: Fix unconditional security_locked_down() call (CVE-2021-46971)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix masking negation logic upon negative dst register (CVE-2021-46974)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
248733	Linux Distros Unpatched Vulnerability : CVE-2021-46971	Nessus	Misc.	low
194454	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:1454-1)	Nessus	SuSE Local Security Checks	high
160443	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-001)	Nessus	Amazon Linux Local Security Checks	high
160442	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-003)	Nessus	Amazon Linux Local Security Checks	high

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