In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd(). Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989052 advisory.

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

    ext4: fix possible UAF when remounting r/o a mmp-protected file system

    After commit 618f003199c6 (ext4: fix memory leak in     ext4_fill_super), after the file system is remounted read-only, there     is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to     point at freed memory, which the call to ext4_stop_mmpd() can trip     over.

    Fix this by only allowing kmmpd() to exit when it is stopped via     ext4_stop_mmpd().

    Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>

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

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-986818 advisory.

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

    ext4: fix possible UAF when remounting r/o a mmp-protected file system

    After commit 618f003199c6 (ext4: fix memory leak in     ext4_fill_super), after the file system is remounted read-only, there     is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to     point at freed memory, which the call to ext4_stop_mmpd() can trip     over.

    Fix this by only allowing kmmpd() to exit when it is stopped via     ext4_stop_mmpd().

    Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>

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

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

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

  - ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 (ext4:
    fix memory leak in ext4_fill_super), after the file system is remounted read-only, there is a race where     the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to     ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via     ext4_stop_mmpd(). Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com> (CVE-2021-47342)

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

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    kernel:ACPI: CPPC: Use access_width over bit_width for system memory accesses(CVE-2024-35995)

    ACPI: LPIT: Avoid u32 multiplication overflow(CVE-2023-52683)

    ACPI: video: check for error while searching for backlight device parent(CVE-2023-52693)

    bpf: Fix stackmap overflow check on 32-bit arches(CVE-2024-36949)

    kernel: block: fix overflow in blk_ioctl_discard()(CVE-2024-36917)

    kernel:block: prevent division by zero in blk_rq_stat_sum()(CVE-2024-35925)

    bpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue(CVE-2024-36938)

    bpf, sockmap: Prevent lock inversion deadlock in map delete elem(CVE-2024-35895)

    kernel:calipso: fix memory leak in netlbl_calipso_add_pass()(CVE-2023-52698)

    drm/amd/display: Avoid NULL dereference of timing generator(CVE-2023-52753)

    drm/amd/display: Skip on writeback when it's not applicable(CVE-2024-36914)

    kernel:erspan: make sure erspan_base_hdr is present in skb-head(CVE-2024-35888)

    kernel: ext4: fix corruption during on-line resize(CVE-2024-35807)

    kernel: ext4: fix possible UAF when remounting r/o a mmp-protected file system(CVE-2021-47342)

    firewire: ohci: mask bus reset interrupts between ISR and bottom half(CVE-2024-36950)

    gfs2: ignore negated quota changes(CVE-2023-52759)

    kernel:HID: i2c-hid: remove I2C_HID_READ_PENDING flag to prevent lock-up(CVE-2024-35997)

    kernel:i2c: smbus: fix NULL function pointer dereference(CVE-2024-35984)

    kernel:i40e: Do not use WQ_MEM_RECLAIM flag for workqueue(CVE-2024-36004)

    kernel:ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()(CVE-2024-36902)

    kernel:ipv6: Fix infinite recursion in fib6_dump_done().(CVE-2024-35886)

    kernel:ipv6: prevent NULL dereference in ip6_output()(CVE-2024-36901)

    kernel:ipvlan: add ipvlan_route_v6_outbound() helper(CVE-2023-52796)

    kernel: md/dm-raid: don#39;t call md_reap_sync_thread() directly(CVE-2024-35808)

    media: bttv: fix use after free error due to btv-timeout timer(CVE-2023-52847)

    media: gspca: cpia1: shift-out-of-bounds in set_flicker(CVE-2023-52764)

    mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update(CVE-2024-35855)

    mlxsw: spectrum_acl_tcam: Fix warning during rehash(CVE-2024-36007)

    kernel:net/mlx5: Properly link new fs rules into the tree(CVE-2024-35960)

    kernel:net/mlx5e: fix a double-free in arfs_create_groups(CVE-2024-35835)

    kernel:net: fix __dst_negative_advice() race(CVE-2024-36971)

    kernel:net: fix out-of-bounds access in ops_init(CVE-2024-36883)

    kernel:netfilter: validate user input for expected length(CVE-2024-35896)

    NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds(CVE-2021-46952)

    nsh: Restore skb-{protocol,data,mac_header} for outer header in nsh_gso_segment().(CVE-2024-36933)

    nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells(CVE-2021-47497)

    kernel: PCI/PM: Drain runtime-idle callbacks before driver removal(CVE-2024-35809)

    kernel: pinctrl: core: delete incorrect free in pinctrl_enable()(CVE-2024-36940)

    platform/x86: wmi: Fix opening of char device(CVE-2023-52864)

    ppdev: Add an error check in register_device(CVE-2024-36015)

    kernel:RDMA: Verify port when creating flow rule(CVE-2021-47265)

    kernel:ring-buffer: Fix a race between readers and resize checks(CVE-2024-38601)

    kernel: scsi: bnx2fc: Remove spin_lock_bh while releasing resources after upload(CVE-2024-36919)

    kernel:scsi: iscsi: Fix iscsi_task use after free(CVE-2021-47427)

    kernel:scsi: lpfc: Release hbalock before calling lpfc_worker_wake_up()(CVE-2024-36924)

    kernel: selinux: avoid dereference of garbage after mount failure(CVE-2024-35904)

    kernel: smb: client: fix use-after-free bug in cifs_debug_data_proc_show()(CVE-2023-52752)

    kernel:tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets(CVE-2024-36905)

    kernel:tcp: properly terminate timers for kernel sockets(CVE-2024-35910)

    kernel:tcp: Use refcount_inc_not_zero() in tcp_twsk_unique().(CVE-2024-36904)

    kernel: thermal: core: prevent potential string overflow(CVE-2023-52868)

    tipc: fix a possible memleak in tipc_buf_append(CVE-2024-36954)

    tipc: fix UAF in error path(CVE-2024-36886)

    kernel:tty: n_gsm: fix possible out-of-bounds in gsm0_receive()(CVE-2024-36016)

    virtio-blk: fix implicit overflow on virtio_max_dma_size(CVE-2023-52762)

    wifi: mac80211: don't return unset power in ieee80211_get_tx_power()(CVE-2023-52832)

    kernel:llc: verify mac len before reading mac header(CVE-2023-52843)

    x86/mm/pat: fix VM_PAT handling in COW mappings(CVE-2024-35877)

    drm/client: Fully protect modes[] with dev-mode_config.mutex(CVE-2024-35950)

    mlxsw: spectrum_acl_tcam: Fix incorrect list API usage(CVE-2024-36006)

    net: bridge: fix vlan tunnel dst refcnt when egressing(CVE-2021-47222)

    net: bridge: fix vlan tunnel dst null pointer dereference(CVE-2021-47223)

    KVM: x86: Immediately reset the MMU context when the SMM flag is cleared(CVE-2021-47230)

    kernel:net: cdc_eem: fix tx fixup skb leak(CVE-2021-47236)

    net: ipv4: fix memory leak in ip_mc_add1_src(CVE-2021-47238)

    netfilter: synproxy: Fix out of bounds when parsing TCP options(CVE-2021-47245)

    udp: fix race between close() and udp_abort()(CVE-2021-47248)

    net: ipv4: fix memory leak in netlbl_cipsov4_add_std(CVE-2021-47250)

    kvm: LAPIC: Restore guard to prevent illegal APIC register access(CVE-2021-47255)

    NFS: Fix use-after-free in nfs4_init_client()(CVE-2021-47259)

    kernel: IB/mlx5: Fix initializing CQ fragments buffer(CVE-2021-47261)

    ftrace: Do not blindly read the ip address in ftrace_bug()(CVE-2021-47276)

    kernel:kvm: avoid speculation-based attacks from out-of-range memslot accesses(CVE-2021-47277)

    kernel: drm: Fix use-after-free read in drm_getunique()(CVE-2021-47280)

    isdn: mISDN: netjet: Fix crash in nj_probe(CVE-2021-47284)

    media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()(CVE-2021-47288)

    net/sched: act_skbmod: Skip non-Ethernet packets(CVE-2021-47293)

    kernel:igb: Fix use-after-free error during reset(CVE-2021-47301)

    igc: Fix use-after-free error during reset(CVE-2021-47302)

    scsi: libfc: Fix array index out of bound exception(CVE-2021-47308)

    virtio-blk: Fix memory leak among suspend/resume procedure(CVE-2021-47319)

    scsi: iscsi: Fix conn use after free during resets(CVE-2021-47328)

    kernel:scsi: megaraid_sas: Fix resource leak in case of probe failure(CVE-2021-47329)

    KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio(CVE-2021-47341)

    kernel: udf: Fix NULL pointer dereference in udf_symlink function(CVE-2021-47353)

    bpf: Add oversize check before call kvcalloc()(CVE-2021-47376)

    mac80211: limit injected vht mcs     ss in ieee80211_parse_tx_radiotap(CVE-2021-47395)

    kernel:sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb(CVE-2021-47397)

    ixgbe: Fix NULL pointer dereference in ixgbe_xdp_setup(CVE-2021-47399)

    HID: usbhid: free raw_report buffers in usbhid_stop(CVE-2021-47405)

    KVM: x86: Handle SRCU initialization failure during page track init(CVE-2021-47407)

    phy: mdio: fix memory leak(CVE-2021-47416)

    net_sched: fix NULL deref in fifo_set_limit()(CVE-2021-47418)

    i40e: Fix freeing of uninitialized misc IRQ vector(CVE-2021-47424)

    kernel:i2c: acpi: fix resource leak in reconfiguration device addition(CVE-2021-47425)

    xhci: Fix command ring pointer corruption while aborting a command(CVE-2021-47434)

    kernel:net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path(CVE-2021-47438)

    can: peak_pci: peak_pci_remove(): fix UAF(CVE-2021-47456)

    audit: fix possible null-pointer dereference in audit_filter_rules(CVE-2021-47464)

    kernel: mm, slub: fix potential memoryleak in kmem_cache_open()(CVE-2021-47466)

    isdn: mISDN: Fix sleeping function called from invalid context(CVE-2021-47468)

    kernel: scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els()(CVE-2021-47473)

    kernel: isofs: Fix out of bound access for corrupted isofs image(CVE-2021-47478)

    kernel:regmap: Fix possible double-free in regcache_rbtree_exit()(CVE-2021-47483)

    kernel:usbnet: sanity check for maxpacket(CVE-2021-47495)

    net/tls: Fix flipped sign in tls_err_abort() calls(CVE-2021-47496)

    kernel:i40e: Fix NULL pointer dereference in i40e_dbg_dump_desc(CVE-2021-47501)

    ALSA: pcm: oss: Fix negative period/buffer sizes(CVE-2021-47511)

    kernel:nfp: Fix memory leak in nfp_cpp_area_cache_add()(CVE-2021-47516)

    serial: core: fix transmit-buffer reset and memleak(CVE-2021-47527)

    kernel:net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources()(CVE-2021-47541)

    tcp: fix page frag corruption on page fault(CVE-2021-47544)

    kernel: scsi: mpt3sas: Fix kernel panic during drive powercycle test(CVE-2021-47565)

    scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select()(CVE-2021-47576)

    ovl: fix warning in ovl_create_real()(CVE-2021-47579)

    media: mxl111sf: change mutex_init() location(CVE-2021-47583)

    sit: do not call ipip6_dev_free() from sit_init_net()(CVE-2021-47588)

    igbvf: fix double free in `igbvf_probe`(CVE-2021-47589)

    kernel:inet_diag: fix kernel-infoleak for UDP sockets(CVE-2021-47597)

    mac80211: track only QoS data frames for admission control(CVE-2021-47602)

    net: netlink: af_netlink: Prevent empty skb by adding a check on len.(CVE-2021-47606)

    PCI: pciehp: Fix infinite loop in IRQ handler upon power fault(CVE-2021-47617)

    kernel:i40e: Fix queues reservation for XDP(CVE-2021-47619)

    kernel: scsi: bnx2fc: Make bnx2fc_recv_frame() mp safe(CVE-2022-48715)

    drm     ouveau: fix off by one in BIOS boundary checking(CVE-2022-48732)

    rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()(CVE-2022-48742)

    net: amd-xgbe: Fix skb data length underflow(CVE-2022-48743)

    kernel:net/mlx5e: Avoid field-overflowing memcpy()(CVE-2022-48744)

    kernel:block: Fix wrong offset in bio_truncate()(CVE-2022-48747)

    phylib: fix potential use-after-free(CVE-2022-48754)

    net: fix information leakage in /proc/net/ptype(CVE-2022-48757)

    scsi: bnx2fc: Flush destroy_work queue before calling bnx2fc_interface_put()(CVE-2022-48758)

    USB: core: Fix hang in usb_kill_urb by adding memory barriers(CVE-2022-48760)

    media: lgdt3306a: Add a check against null-pointer-def(CVE-2022-48772)

    Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj(CVE-2022-48775)

    vsock: remove vsock from connected table when connect is interrupted by a signal(CVE-2022-48786)

    nvme-rdma: fix possible use-after-free in transport error_recovery work(CVE-2022-48788)

    nvme-tcp: fix possible use-after-free in transport error_recovery work(CVE-2022-48789)

    nvme: fix a possible use-after-free in controller reset during load(CVE-2022-48790)

    kernel:vt_ioctl: fix array_index_nospec in vt_setactivate(CVE-2022-48804)

    net: fix a memleak when uncloning an skb dst and its metadata(CVE-2022-48809)

    ipmr,ip6mr: acquire RTNL before calling ip[6]mr_free_table() on failure path(CVE-2022-48810)

    scsi: qedf: Fix refcount issue when LOGO is received during TMF(CVE-2022-48823)

    NFSD: Fix ia_size underflow(CVE-2022-48828)

    Input: aiptek - properly check endpoint type(CVE-2022-48836)

    net/packet: fix slab-out-of-bounds access in packet_recvmsg()(CVE-2022-48839)

    drm/vrr: Set VRR capable prop only if it is attached to connector(CVE-2022-48843)

    net-sysfs: add check for netdevice being present to speed_show(CVE-2022-48850)

    kernel:sctp: fix kernel-infoleak for SCTP sockets(CVE-2022-48855)

    tipc: fix kernel panic when enabling bearer(CVE-2022-48865)

    The brcm80211 component in the Linux kernel through 6.5.10 has a brcmf_cfg80211_detach use-after-free in     the device unplugging (disconnect the USB by hotplug) code. For physically proximate attackers with local     access, this 'could be exploited in a real world scenario.' This is related to     brcmf_cfg80211_escan_timeout_worker in     drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c.(CVE-2023-47233)

    kernel:net/usb: kalmia: Don't pass act_len in usb_bulk_msg error path(CVE-2023-52703)

    sched/psi: Fix use-after-free in ep_remove_wait_queue()(CVE-2023-52707)

    mmc: sdio: fix possible resource leaks in some error paths(CVE-2023-52730)

    cifs: Fix use-after-free in rdata-read_into_pages()(CVE-2023-52741)

    IB/hfi1: Restore allocated resources on failed copyout(CVE-2023-52747)

    media: imon: fix access to invalid resource for the second interface(CVE-2023-52754)

    kernel:SUNRPC: Fix RPC client cleaned up the freed pipefs dentries(CVE-2023-52803)

    scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup()(CVE-2023-52809)

    kernel: crypto: pcrypt - Fix hungtask for PADATA_RESET(CVE-2023-52813)

    atl1c: Work around the DMA RX overflow issue(CVE-2023-52834)

    tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING(CVE-2023-52845)

    tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc(CVE-2023-52880)

    kernel:tcp: do not accept ACK of bytes we never sent(CVE-2023-52881)

    A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious     actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL     pointer dereference in the NVMe driver, causing kernel panic and a denial of service.(CVE-2023-6536)

    In the Linux kernel through 6.7.1, there is a use-after-free in cec_queue_msg_fh, related to     drivers/media/cec/core/cec-adap.c and drivers/media/cec/core/cec-api.c.(CVE-2024-23848)

    A race condition was found in the Linux kernel's net/bluetooth in sniff_{min,max}_interval_set() function.
    This can result in a bluetooth sniffing exception issue, possibly leading denial of     service.(CVE-2024-24859)

    ipv6: fix potential 'struct net' leak in inet6_rtm_getaddr()(CVE-2024-27417)

    genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline(CVE-2024-31076)

    ipvlan: Dont Use skb-sk in ipvlan_process_v{4,6}_outbound(CVE-2024-33621)

    kernel: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes(CVE-2024-35789)

    kernel:fix lockup in dm_exception_table_exit  There was reported lockup(CVE-2024-35805)

    wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach(CVE-2024-35811)

    mlxsw: spectrum_acl_tcam: Fix memory leak during rehash(CVE-2024-35853)

    net/sched: act_skbmod: prevent kernel-infoleak(CVE-2024-35893)

    netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get()(CVE-2024-35898)

    kernel:scsi: lpfc: Fix possible memory leak in lpfc_rcv_padisc()  (CVE-2024-35930)

    dyndbg: fix old BUG_ON in control parser(CVE-2024-35947)

    kernel:netfilter: complete validation of user input(CVE-2024-35962)

    kernel:ipv6: fix race condition between ipv6_get_ifaddr and ipv6_del_addr(CVE-2024-35969)

    xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING(CVE-2024-35976)

    rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation(CVE-2024-36017)

    netfilter: nfnetlink_queue: acquire rcu_read_lock() in instance_destroy_rcu()(CVE-2024-36286)

    wifi: nl80211: don't free NULL coalescing rule(CVE-2024-36941)

    kernel: scsi: lpfc: Move NPIV's transport unregistration to after resource clean up(CVE-2024-36952)

    drm/vmwgfx: Fix invalid reads in fence signaled events(CVE-2024-36960)

    kernel:virtio: delete vq in vp_find_vqs_msix() when request_irq() fails(CVE-2024-37353)

    kernel:tcp: Fix shift-out-of-bounds in dctcp_update_alpha().(CVE-2024-37356)

    kernel:net: bridge: xmit: make sure we have at least eth header len bytes(CVE-2024-38538)

    drm/amd/display: Fix potential index out of bounds in color transformation function(CVE-2024-38552)

    net: openvswitch: fix overwriting ct original tuple for ICMPv6(CVE-2024-38558)

    kernel:scsi: qedf: Ensure the copied buf is NUL terminated(CVE-2024-38559)

    kernel:ftrace: Fix possible use-after-free issue in ftrace_location()(CVE-2024-38588)

    kernel:af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg(CVE-2024-38596)

    kernel: ext4: fix mb_cache_entry#39;s e_refcnt leak in ext4_xattr_block_cache_find()(CVE-2024-39276)

    kernel:kdb: Fix buffer overflow during tab-complete(CVE-2024-39480)

    kernel:bonding: Fix out-of-bounds read in bond_option_arp_ip_targets_set()(CVE-2024-39487)

    crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak(CVE-2024-39493)

    kernel:ima: Fix use-after-free on a dentry's dname.name(CVE-2024-39494)

    vmci: prevent speculation leaks by sanitizing event in event_deliver()(CVE-2024-39499)

    drivers: core: synchronize really_probe() and dev_uevent()(CVE-2024-39501)

    scsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory(CVE-2024-40901)

    kernel:USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages(CVE-2024-40904)

    kernel:ipv6: prevent possible NULL dereference in rt6_probe()(CVE-2024-40960)

    scsi: qedi: Fix crash while reading debugfs attribute(CVE-2024-40978)

    kernel:ACPICA: Revert 'ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine.(CVE-2024-40984)

    kernel:net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()(CVE-2024-40995)

    kernel:ext4: fix uninitialized ratelimit_state-lock access in __ext4_fill_super()(CVE-2024-40998)

    kernel:netpoll: Fix race condition in netpoll_owner_active(CVE-2024-41005)

    kernel:tcp: avoid too many retransmit packets(CVE-2024-41007)

Tenable has extracted the preceding description block directly from the EulerOS kernel 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 5.10.82-83.359. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2024-049 advisory.

    A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could     happen if removing device (that is not common to remove video card physically without power-off, but same     happens if unbind the driver). (CVE-2020-27820)

    A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the     way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del()     together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A     privileged local user could use this flaw to crash the system or escalate their privileges on the system.
    (CVE-2021-3640)

    A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP     association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and     the attacker can send packets with spoofed IP addresses. (CVE-2021-3772)

    A race condition was found in the Linux kernel's ebpf verifier between bpf_map_update_elem and     bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special     privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. (CVE-2021-4001)

    A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some     regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the     memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)

    A flaw heap buffer overflow in the Linux kernel's AMD Radeon graphics card driver was found in the way     user writes some malicious data to the AMD GPU Display Driver Debug Filesystem (to the VGA sub-directory     of the /sys/kernel/debug/ directory). A local user could use this flaw to crash the system or escalate     their privileges on the system. (CVE-2021-42327)

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

    i40e: Fix NULL ptr dereference on VSI filter sync (CVE-2021-47184)

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

    tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc (CVE-2021-47185)

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

    tipc: check for null after calling kmemdup (CVE-2021-47186)

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

    btrfs: fix memory ordering between normal and ordered work functions (CVE-2021-47189)

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

    perf bpf: Avoid memory leak from perf_env__insert_btf() (CVE-2021-47190)

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

    scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() (CVE-2021-47191)

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

    scsi: core: sysfs: Fix hang when device state is set via sysfs (CVE-2021-47192)

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

    net/mlx5e: nullify cq->dbg pointer in mlx5_debug_cq_remove() (CVE-2021-47197)

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

    iavf: free q_vectors before queues in iavf_disable_vf (CVE-2021-47201)

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

    thermal: Fix NULL pointer dereferences in of_thermal_ functions (CVE-2021-47202)

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

    scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() (CVE-2021-47203)

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

    x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails (CVE-2021-47217)

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

    selinux: fix NULL-pointer dereference when hashtab allocation fails (CVE-2021-47218)

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

    scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs() (CVE-2021-47219)

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

    ext4: fix possible UAF when remounting r/o a mmp-protected file system (CVE-2021-47342)

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

    netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value (CVE-2021-47451)

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

    can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv (CVE-2021-47459)

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

    ocfs2: fix data corruption after conversion from inline format (CVE-2021-47460)

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

    userfaultfd: fix a race between writeprotect and exit_mmap() (CVE-2021-47461)

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

    audit: fix possible null-pointer dereference in audit_filter_rules (CVE-2021-47464)

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

    mm, slub: fix potential memoryleak in kmem_cache_open() (CVE-2021-47466)

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

    scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() (CVE-2021-47473)

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

    isofs: Fix out of bound access for corrupted isofs image (CVE-2021-47478)

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

    scsi: core: Put LLD module refcnt after SCSI device is released (CVE-2021-47480)

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

    regmap: Fix possible double-free in regcache_rbtree_exit() (CVE-2021-47483)

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

    drm/ttm: fix memleak in ttm_transfered_destroy (CVE-2021-47490)

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

    mm: khugepaged: skip huge page collapse for special files (CVE-2021-47491)

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

    mm, thp: bail out early in collapse_file for writeback page (CVE-2021-47492)

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

    usbnet: sanity check for maxpacket (CVE-2021-47495)

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

    net/tls: Fix flipped sign in tls_err_abort() calls (CVE-2021-47496)

    A use-after-free flaw was found in the Linux kernel's Ext4 File System in how a user triggers several file     operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially     escalate their privileges on the system. (CVE-2023-1252)

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
273492	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989052)	Nessus	Unity Linux Local Security Checks	high
268216	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986818)	Nessus	Unity Linux Local Security Checks	high
239227	TencentOS Server 4: kernel (TSSA-2025:0048)	Nessus	Tencent Local Security Checks	critical
230141	Linux Distros Unpatched Vulnerability : CVE-2021-47342	Nessus	Misc.	high
207120	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2024-2394)	Nessus	Huawei Local Security Checks	high
202513	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2024-1937)	Nessus	Huawei Local Security Checks	high
190033	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2024-049)	Nessus	Amazon Linux Local Security Checks	high

Detections

Analytics

CVE-2021-47342

high

Tenable Plugins

high

high

critical

high

high

high

high