In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and update_effective_progs(). If the memory allocation in this function fails, the function restores the pointer to the bpf_cgroup_link on the cgroup list, but the memory gets freed just after it returns. After this, every subsequent call to update_effective_progs() causes this already deallocated pointer to be dereferenced in prog_list_length(), and triggers KASAN UAF error. To fix this issue don't preserve the pointer to the prog or link in the list, but remove it and replace it with a dummy prog without shrinking the table. The subsequent call to __cgroup_bpf_detach() or __cgroup_bpf_detach() will correct it.

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: bpf: Fix KASAN use-after-free Read in     compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer     creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on     them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and     update_effective_progs(). If the memory allocation in this function fails, the function restores the     pointer to the bpf_cgroup_link on the cgroup list, but the memory gets freed just after it returns. After     this, every subsequent call to update_effective_progs() causes this already deallocated pointer to be     dereferenced in prog_list_length(), and triggers KASAN UAF error. To fix this issue don't preserve the     pointer to the prog or link in the list, but remove it and replace it with a dummy prog without shrinking     the table. The subsequent call to __cgroup_bpf_detach() or __cgroup_bpf_detach() will correct it.
    (CVE-2022-50219)

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

The version of kernel installed on the remote host is prior to 5.10.144-127.601. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2022-020 advisory.

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

    i2c: Fix a potential use after free

    Free the adap structure only after we are done using it.This patch just moves the put_device() down a bit     to avoid theuse after free.

    [wsa: added comment to the code, added Fixes tag] (CVE-2019-25162)

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

    tun: avoid double free in tun_free_netdev (CVE-2021-47082)

    A use-after-free flaw was found in the Linux kernel's Atheros wireless adapter driver in the way a user     forces the ath9k_htc_wait_for_target function to fail with some input messages. This flaw allows a local     user to crash or potentially escalate their privileges on the system. (CVE-2022-1679)

    A flaw was found in the Linux kernel's KVM when attempting to set a SynIC IRQ. This issue makes it     possible for a misbehaving VMM to write to SYNIC/STIMER MSRs, causing a NULL pointer dereference. This     flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel     oops condition that results in a denial of service. (CVE-2022-2153)

    A use-after-free flaw was found in the Linux kernel's POSIX CPU timers functionality in the way a user     creates and then deletes the timer in the non-leader thread of the program. This flaw allows a local user     to crash or potentially escalate their privileges on the system. (CVE-2022-2585)

    It was discovered that a nft object or expression could reference a nft set on a different nft table,     leading to a use-after-free once that table was deleted. (CVE-2022-2586)

    A use-after-free flaw was found in route4_change in the net/sched/cls_route.c filter implementation in the     Linux kernel. This flaw allows a local user to crash the system and possibly lead to a local privilege     escalation problem. (CVE-2022-2588)

    Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow     an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)

    An issue was found in the Linux kernel in nf_conntrack_irc where the message handling can be confused and     incorrectly matches the message. A firewall may be able to be bypassed when users are using unencrypted     IRC with nf_conntrack_irc configured. (CVE-2022-2663)

    An out-of-bounds memory read flaw was found in the Linux kernel's BPF subsystem in how a user calls the     bpf_tail_call function with a key larger than the max_entries of the map. This flaw allows a local user to     gain unauthorized access to data. (CVE-2022-2905)

    A race condition was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem)     when multiple calls to xfrm_probe_algs occurred simultaneously. This flaw could allow a local attacker to     potentially trigger an out-of-bounds write or leak kernel heap memory by performing an out-of-bounds read     and copying it into a socket. (CVE-2022-3028)

    A use-after-free flaw was found in io_uring in the Linux kernel. This flaw allows a local user to trigger     the issue if a signalfd or binder fd is polled with the io_uring poll due to a lack of io_uring POLLFREE     handling. (CVE-2022-3176)

    A vulnerability was found in Linux Kernel. It has been classified as critical. This affects the function     devlink_param_set/devlink_param_get of the file net/core/devlink.c of the component IPsec. The     manipulation leads to use after free. It is recommended to apply a patch to fix this issue. The identifier     VDB-211929 was assigned to this vulnerability. (CVE-2022-3625)

    An issue was discovered in include/asm-generic/tlb.h in the Linux kernel before 5.19. Because of a race     condition (unmap_mapping_range versus munmap), a device driver can free a page while it still has stale     TLB entries. This only occurs in situations with VM_PFNMAP VMAs. (CVE-2022-39188)

    An issue was discovered in net/netfilter/nf_tables_api.c in the Linux kernel before 5.19.6. A denial of     service can occur upon binding to an already bound chain. (CVE-2022-39190)

    A race condition in the Linux kernel's EFI capsule loader driver was found in the way it handled write and     flush operations on the device node of the EFI capsule. A local user could potentially use this flaw to     crash the system. (CVE-2022-40307)

    mm/mremap.c in the Linux kernel before 5.13.3 has a use-after-free via a stale TLB because an rmap lock is     not held during a PUD move. (CVE-2022-41222)

    A double-free flaw was found in the Linux kernel's TUN/TAP device driver functionality in how a user     registers the device when the register_netdevice function fails (NETDEV_REGISTER notifier). This flaw     allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-4744)

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

    IB/core: Fix a nested dead lock as part of ODP flow (CVE-2022-48675)

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

    nvme-tcp: fix UAF when detecting digest errors (CVE-2022-48686)

    In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix out-of-bounds read when     setting HMAC data. The SRv6 layer allows defining HMAC data that can later be used to sign IPv6 Segment     Routing Headers. This configuration is realised via netlink through four attributes: SEG6_ATTR_HMACKEYID,     SEG6_ATTR_SECRET, SEG6_ATTR_SECRETLEN and SEG6_ATTR_ALGID. (CVE-2022-48687)

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

    i40e: Fix kernel crash during module removal (CVE-2022-48688)

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

    netfilter: nf_tables: clean up hook list when offload flags check fails (CVE-2022-48691)

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

    scsi: mpt3sas: Fix use-after-free warning (CVE-2022-48695)

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

    nvmet: fix a use-after-free (CVE-2022-48697)

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

    drm/radeon: add a force flush to delay work when radeon (CVE-2022-48704)

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

    tcp: Fix data-races around sysctl_tcp_l3mdev_accept. (CVE-2022-49599)

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

    USB: core: Prevent nested device-reset calls (CVE-2022-49936)

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

    vt: Clear selection before changing the font (CVE-2022-49948)

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

    net/sched: fix netdevice reference leaks in attach_default_qdiscs() (CVE-2022-49958)

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

    arm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level (CVE-2022-49964)

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

    bpf: Don't redirect packets with invalid pkt_len (CVE-2022-49975)

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

    ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead (CVE-2022-49977)

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

    net: fix refcount bug in sk_psock_get (2) (CVE-2022-49979)

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

    HID: hidraw: fix memory leak in hidraw_release() (CVE-2022-49981)

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

    HID: steam: Prevent NULL pointer dereference in steam_{recv,send}_report (CVE-2022-49984)

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

    bpf: Don't use tnum_range on array range checking for poke descriptors (CVE-2022-49985)

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

    scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq (CVE-2022-49986)

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

    md: call __md_stop_writes in md_stop (CVE-2022-49987)

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

    xen/privcmd: fix error exit of privcmd_ioctl_dm_op() (CVE-2022-49989)

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

    loop: Check for overflow while configuring loop (CVE-2022-49993)

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

    rxrpc: Fix locking in rxrpc's sendmsg (CVE-2022-49998)

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

    xfrm: policy: fix metadata dst->dev xmit null pointer dereference (CVE-2022-50004)

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

    NFSv4.2 fix problems with __nfs42_ssc_open (CVE-2022-50006)

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

    xfrm: fix refcount leak in __xfrm_policy_check() (CVE-2022-50007)

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

    kprobes: don't call disarm_kprobe() for disabled kprobes (CVE-2022-50008)

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

    drivers:md:fix a potential use-after-free bug (CVE-2022-50022)

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

    scsi: lpfc: Prevent buffer overflow crashes in debugfs with malformed user input (CVE-2022-50030)

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

    net: genl: fix error path memory leak in policy dumping (CVE-2022-50042)

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

    iavf: Fix adminq error handling (CVE-2022-50055)

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

    ceph: don't leak snap_rwsem in handle_cap_grant (CVE-2022-50059)

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

    virtio_net: fix memory leak inside XPD_TX with mergeable (CVE-2022-50065)

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

    NFSv4/pnfs: Fix a use-after-free bug in open (CVE-2022-50072)

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

    ext4: fix warning in ext4_iomap_begin as race between bmap and write (CVE-2022-50082)

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

    ext4: add EXT4_INODE_HAS_XATTR_SPACE macro in xattr.h (CVE-2022-50083)

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

    dm raid: fix address sanitizer warning in raid_status (CVE-2022-50084)

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

    dm raid: fix address sanitizer warning in raid_resume (CVE-2022-50085)

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

    firmware: arm_scpi: Ensure scpi_info is not assigned if the probe fails (CVE-2022-50087)

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

    dm thin: fix use-after-free crash in dm_sm_register_threshold_callback (CVE-2022-50092)

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

    iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE) (CVE-2022-50093)

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

    posix-cpu-timers: Cleanup CPU timers before freeing them during exec (CVE-2022-50095)

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

    video: fbdev: s3fb: Check the size of screen before memset_io() (CVE-2022-50097)

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

    sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed (CVE-2022-50103)

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

    jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted (CVE-2022-50126)

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

    RDMA/rxe: Fix error unwind in rxe_create_qp() (CVE-2022-50127)

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

    RDMA/srpt: Fix a use-after-free (CVE-2022-50129)

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

    RDMA/qedr: Fix potential memory leak in __qedr_alloc_mr() (CVE-2022-50138)

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

    driver core: fix potential deadlock in __driver_attach (CVE-2022-50149)

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

    usb: host: Fix refcount leak in ehci_hcd_ppc_of_probe (CVE-2022-50153)

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

    virtio-gpu: fix a missing check to avoid NULL dereference (CVE-2022-50181)

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

    drm/radeon: fix potential buffer overflow in ni_set_mc_special_registers() (CVE-2022-50185)

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

    regulator: of: Fix refcount leak bug in of_get_regulation_constraints() (CVE-2022-50191)

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

    selinux: Add boundary check in put_entry() (CVE-2022-50200)

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

    PM: hibernate: defer device probing when resuming from hibernation (CVE-2022-50202)

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

    ext2: Add more validity checks for inode counts (CVE-2022-50205)

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

    arm64: fix oops in concurrently setting insn_emulation sysctls (CVE-2022-50206)

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

    md-raid10: fix KASAN warning (CVE-2022-50211)

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

    netfilter: nf_tables: do not allow CHAIN_ID to refer to another table (CVE-2022-50212)

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

    netfilter: nf_tables: do not allow SET_ID to refer to another table (CVE-2022-50213)

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

    scsi: sg: Allow waiting for commands to complete on removed device (CVE-2022-50215)

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

    bpf: Fix KASAN use-after-free Read in compute_effective_progs (CVE-2022-50219)

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

    usbnet: Fix linkwatch use-after-free on disconnect (CVE-2022-50220)

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

    tty: vt: initialize unicode screen buffer (CVE-2022-50222)

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

    KVM: SVM: Don't BUG if userspace injects an interrupt with GIF=0 (CVE-2022-50228)

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

    crypto: arm64/poly1305 - fix a read out-of-bound (CVE-2022-50231)

    In nf_tables_updtable, if nf_tables_table_enable returns an error, nft_trans_destroy is called to free the     transaction object. nft_trans_destroy() calls list_del(), but the transaction was never placed on a list
    -- the list head is all zeroes, this results in a NULL pointer dereference. (CVE-2023-1095)

    The upstream advisory describes this issue as follows:

    This vulnerability allows local attackers to disclose sensitive information on affected installations of     the Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target     system in order to exploit this vulnerability.

    The specific flaw exists within the processing of seg6 attributes. The issue results from the lack of     proper validation of user-supplied data, which can result in a read past the end of an allocated buffer.
    An attacker can leverage this in conjunction with other vulnerabilties to escalate privileges and execute     arbitrary code in the context of the kernel. (CVE-2023-2860)

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 remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4431 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: use after free in the video driver leads to local privilege escalation (CVE-2019-9458)

    * kernel: use-after-free in drivers/bluetooth/hci_ldisc.c (CVE-2019-15917)

    * kernel: out-of-bounds access in function hclge_tm_schd_mode_vnet_base_cfg (CVE-2019-15925)

    * kernel: memory leak in ccp_run_sha_cmd() (CVE-2019-18808)

    * kernel: Denial Of Service in the __ipmi_bmc_register() (CVE-2019-19046)

    * kernel: out-of-bounds write in ext4_xattr_set_entry (CVE-2019-19319)

    * Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid (CVE-2019-19332)

    * kernel: use-after-free in ext4_put_super (CVE-2019-19447)

    * kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free     (CVE-2019-19524)

    * kernel: race condition caused by a malicious USB device in the USB character device driver layer     (CVE-2019-19537)

    * kernel: use-after-free in serial_ir_init_module() (CVE-2019-19543)

    * kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry (CVE-2019-19767)

    * kernel: use-after-free in debugfs_remove (CVE-2019-19770)

    * kernel: out-of-bounds write via crafted keycode table (CVE-2019-20636)

    * kernel: possible use-after-free due to a race condition in cdev_get  (CVE-2020-0305)

    * kernel: out-of-bounds read in in vc_do_resize function (CVE-2020-8647)

    * kernel: use-after-free in n_tty_receive_buf_common function (CVE-2020-8648)

    * kernel: invalid read location in vgacon_invert_region function (CVE-2020-8649)

    * kernel: uninitialized kernel data leak in userspace coredumps (CVE-2020-10732)

    * kernel: SELinux netlink permission check bypass (CVE-2020-10751)

    * kernel: out-of-bounds write in mpol_parse_str  (CVE-2020-11565)

    * kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)

    * kernel: buffer overflow in mt76_add_fragment function (CVE-2020-12465)

    * kernel: xdp_umem_reg in net/xdp/xdp_umem.c has an out-of-bounds write which could result in crash and     data coruption (CVE-2020-12659)

    * kernel: sg_write function lacks an sg_remove_request call in a certain failure case (CVE-2020-12770)

    * kernel: possible to send arbitrary signals to a privileged (suidroot) parent process (CVE-2020-12826)

    * kernel: referencing inode of removed superblock in get_futex_key() causes UAF (CVE-2020-14381)

    * kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS (CVE-2020-25641)

    * kernel: kernel pointer leak due to WARN_ON statement in video driver leads to local information     disclosure (CVE-2019-9455)

    * kernel: null pointer dereference in dlpar_parse_cc_property  (CVE-2019-12614)

    * kernel: null-pointer dereference in drivers/net/fjes/fjes_main.c (CVE-2019-16231)

    * kernel: null pointer dereference in drivers/scsi/qla2xxx/qla_os.c (CVE-2019-16233)

    * kernel: memory leak in  af9005_identify_state() function (CVE-2019-18809)

    * kernel: A memory leak in the mwifiex_pcie_alloc_cmdrsp_buf() function (CVE-2019-19056)

    * kernel: memory leak in the crypto_report() function (CVE-2019-19062)

    * kernel: Two memory leaks in the rtl_usb_probe() function (CVE-2019-19063)

    * kernel: A memory leak in the rtl8xxxu_submit_int_urb() function (CVE-2019-19068)

    * kernel: A memory leak in the predicate_parse() function (CVE-2019-19072)

    * kernel: information leak bug caused  by a malicious USB device in the drivers/media/usb/ttusb-     dec/ttusb_dec.c (CVE-2019-19533)

    * kernel: Null pointer dereference in drop_sysctl_table() (CVE-2019-20054)

    * kernel: kernel stack information leak on s390/s390x (CVE-2020-10773)

    * kernel: possibility of memory disclosure when reading the file /proc/sys/kernel/rh_features     (CVE-2020-10774)

    * kernel: vhost-net: stack overflow in get_raw_socket while checking sk_family field (CVE-2020-10942)

    * kernel: sync of excessive duration via an XFS v5 image with crafted metadata (CVE-2020-12655)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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
248286	Linux Distros Unpatched Vulnerability : CVE-2022-50219	Nessus	Misc.	medium
166124	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2022-020 (ALASKERNEL-5.10-2022-020)	Nessus	Amazon Linux Local Security Checks	high
166118	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2022-008 (ALASKERNEL-5.15-2022-008)	Nessus	Amazon Linux Local Security Checks	high
142430	RHEL 8 : kernel (RHSA-2020:4431)	Nessus	Red Hat Local Security Checks	high

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