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

  - tcp: add sanity tests to TCP_QUEUE_SEQ Qingyu Li reported a syzkaller bug where the repro changes RCV SEQ
    _after_ restoring data in the receive queue. mprotect(0x4aa000, 12288, PROT_READ) = 0 mmap(0x1ffff000,     4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216,     PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000,     4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 socket(AF_INET6, SOCK_STREAM,     IPPROTO_IP) = 3 setsockopt(3, SOL_TCP, TCP_REPAIR, [1], 4) = 0 connect(3, {sa_family=AF_INET6,     sin6_port=htons(0), sin6_flowinfo=htonl(0), inet_pton(AF_INET6, ::1, &sin6_addr), sin6_scope_id=0}, 28)     = 0 setsockopt(3, SOL_TCP, TCP_REPAIR_QUEUE, [1], 4) = 0 sendmsg(3, {msg_name=NULL, msg_namelen=0,     msg_iov=[{iov_base=0x0000000000000003\0\0, iov_len=20}], msg_iovlen=1, msg_controllen=0, msg_flags=0},     0) = 20 setsockopt(3, SOL_TCP, TCP_REPAIR, [0], 4) = 0 setsockopt(3, SOL_TCP, TCP_QUEUE_SEQ, [128], 4) = 0     recvfrom(3, NULL, 20, 0, NULL, NULL) = -1 ECONNRESET (Connection reset by peer) syslog shows: [     111.205099] TCP recvmsg seq # bug 2: copied 80, seq 0, rcvnxt 80, fl 0 [ 111.207894] WARNING: CPU: 1 PID:
    356 at net/ipv4/tcp.c:2343 tcp_recvmsg_locked+0x90e/0x29a0 This should not be allowed. TCP_QUEUE_SEQ     should only be used when queues are empty. This patch fixes this case, and the tx path as well.
    (CVE-2021-4442)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4356 advisory.

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

    Security Fix(es):
    * kernel: out-of-bounds reads in pinctrl subsystem (CVE-2020-0427)
    * kernel: Improper input validation in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24502)
    * kernel: Insufficient access control in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24503)
    * kernel: Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers     (CVE-2020-24504)
    * kernel: Fragmentation cache not cleared on reconnection (CVE-2020-24586)
    * kernel: Reassembling fragments encrypted under different keys (CVE-2020-24587)
    * kernel: wifi frame payload being parsed incorrectly as an L2 frame (CVE-2020-24588)
    * kernel: Forwarding EAPOL from unauthenticated wifi client (CVE-2020-26139)
    * kernel: accepting plaintext data frames in protected networks (CVE-2020-26140)
    * kernel: not verifying TKIP MIC of fragmented frames (CVE-2020-26141)
    * kernel: accepting fragmented plaintext frames in protected networks (CVE-2020-26143)
    * kernel: accepting unencrypted A-MSDU frames that start with RFC1042 header (CVE-2020-26144)
    * kernel: accepting plaintext broadcast fragments as full frames (CVE-2020-26145)
    * kernel: powerpc: RTAS calls can be used to compromise kernel integrity (CVE-2020-27777)
    * kernel: locking inconsistency in tty_io.c and tty_jobctrl.c can lead to a read-after-free     (CVE-2020-29660)
    * kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function via a long SSID value     (CVE-2020-36158)
    * kernel: slab out-of-bounds read in hci_extended_inquiry_result_evt()  (CVE-2020-36386)
    * kernel: Improper access control in BlueZ may allow information disclosure vulnerability. (CVE-2021-0129)
    * kernel: Use-after-free in ndb_queue_rq() in drivers/block/nbd.c (CVE-2021-3348)
    * kernel: Linux kernel eBPF RINGBUF map oversized allocation (CVE-2021-3489)
    * kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)
    * kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)
    * kernel: eBPF 32-bit source register truncation on div/mod (CVE-2021-3600)
    * kernel: DoS in rb_per_cpu_empty() (CVE-2021-3679)
    * kernel: Mounting overlayfs inside an unprivileged user namespace can reveal files (CVE-2021-3732)
    * kernel: heap overflow in __cgroup_bpf_run_filter_getsockopt() (CVE-2021-20194)
    * kernel: Race condition in sctp_destroy_sock list_del (CVE-2021-23133)
    * kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode     (CVE-2021-28950)
    * kernel: System crash in intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c (CVE-2021-28971)
    * kernel: protection can be bypassed to leak content of kernel memory (CVE-2021-29155)
    * kernel: improper input validation in tipc_nl_retrieve_key function in net/tipc/node.c (CVE-2021-29646)
    * kernel: lack a full memory barrier may lead to DoS (CVE-2021-29650)
    * kernel: local escalation of privileges in handling of eBPF programs (CVE-2021-31440)
    * kernel: protection of stack pointer against speculative pointer arithmetic can be bypassed to leak     content of kernel memory (CVE-2021-31829)
    * kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic     operations by BPF verifier (CVE-2021-33200)
    * kernel: reassembling encrypted fragments with non-consecutive packet numbers (CVE-2020-26146)
    * kernel: reassembling mixed encrypted/plaintext fragments (CVE-2020-26147)
    * kernel: the copy-on-write implementation can grant unintended write access because of a race condition     in a THP mapcount check (CVE-2020-29368)
    * kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50 (CVE-2021-3635)
    * kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c (CVE-2021-3659)
    * kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure (CVE-2021-20239)
    * kernel: out of bounds array access in drivers/md/dm-ioctl.c (CVE-2021-31916)

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.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:3566-1 advisory.

    The SUSE Linux Enterprise 12 SP5 RT kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2024-46854: net: dpaa: Pad packets to ETH_ZLEN (bsc#1231084).
    - CVE-2024-46770: ice: Add netif_device_attach/detach into PF reset flow (bsc#1230763).
    - CVE-2024-41073: nvme: avoid double free special payload (bsc#1228635).
    - CVE-2024-41079: nvmet: always initialize cqe.result (bsc#1228615).
    - CVE-2024-46859: platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses (bsc#1231089).
    - CVE-2024-46853: spi: nxp-fspi: fix the KASAN report out-of-bounds bug (bsc#1231083).
    - CVE-2022-48945: media: vivid: fix compose size exceed boundary (bsc#1230398).
    - CVE-2024-41082: nvme-fabrics: use reserved tag for reg read/write command  (bsc#1228620 CVE-2024-41082).
    - CVE-2024-46822: arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry (bsc#1231120).
    - CVE-2024-43890: tracing: Fix overflow in get_free_elt() (bsc#1229764).
    - CVE-2024-46731: drm/amd/pm: fix the Out-of-bounds read warning (bsc#1230709).
    - CVE-2024-46772: drm/amd/display: Check denominator crb_pipes before used (bsc#1230772).
    - CVE-2024-46722: drm/amdgpu: fix mc_data out-of-bounds read warning (bsc#1230712).
    - CVE-2024-46787: userfaultfd: fix checks for huge PMDs (bsc#1230815).
    - CVE-2022-48911: kabi: add __nf_queue_get_refs() for kabi compliance.  (bsc#1229633).
    - CVE-2024-46753: btrfs: handle errors from btrfs_dec_ref() properly (bsc#1230796).
    - CVE-2024-46761: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv (bsc#1230761).
    - CVE-2024-46759: hwmon: (adc128d818) Fix underflows seen when writing limit attributes (bsc#1230814).
    - CVE-2024-46745: Input: uinput - reject requests with unreasonable number of slots (bsc#1230748).
    - CVE-2024-46738: VMCI: Fix use-after-free when removing resource in vmci_resource_remove() (bsc#1230731).
    - CVE-2024-46783: tcp_bpf: fix return value of tcp_bpf_sendmsg() (bsc#1230810).
    - CVE-2024-44982: drm/msm/dpu: cleanup FB if dpu_format_populate_layout fails (bsc#1230204).
    - CVE-2024-46723: drm/amdgpu: fix ucode out-of-bounds read warning (bsc#1230702).
    - CVE-2024-46750: PCI: Add missing bridge lock to pci_bus_lock() (bsc#1230783).
    - CVE-2024-46717: net/mlx5e: SHAMPO, Fix incorrect page release (bsc#1230719).
    - CVE-2024-40973: media: mtk-vcodec: potential null pointer deference in SCP (bsc#1227890).
    - CVE-2024-46744: Squashfs: sanity check symbolic link size (bsc#1230747).
    - CVE-2024-46743: of/irq: Prevent device address out-of-bounds read in interrupt map walk (bsc#1230756).
    - CVE-2024-46715: driver: iio: add missing checks on iio_info's callback access  (bsc#1230700).
    - CVE-2024-46685: pinctrl: single: fix potential NULL dereference in pcs_get_function() (bsc#1230515)
    - CVE-2024-46675: usb: dwc3: core: Prevent USB core invalid event buffer address access (bsc#1230533).
    - CVE-2024-46702: thunderbolt: Mark XDomain as unplugged when router is removed (bsc#1230589)
    - CVE-2024-46686: smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req() (bsc#1230517).
    - CVE-2024-46673: scsi: aacraid: Fix double-free on probe failure (bsc#1230506).
    - CVE-2024-46721: pparmor: fix possible NULL pointer dereference (bsc#1230710)
    - CVE-2024-46677: gtp: fix a potential NULL pointer dereference (bsc#1230549).
    - CVE-2024-46676: nfc: pn533: Add poll mod list filling check (bsc#1230535).
    - CVE-2024-46679: ethtool: check device is present when getting link settings (bsc#1230556).
    - CVE-2024-43914: md/raid5: avoid BUG_ON() while continue reshape after reassembling (bsc#1229790).
    - CVE-2024-44946: kcm: Serialise kcm_sendmsg() for the same socket (bsc#1230015).
    - CVE-2024-46707: KVM: arm64: Make ICC_*SGI*_EL1 undef in the absence of a vGICv3  (bsc#1230582).
    - CVE-2022-48799: perf: Fix list corruption in perf_cgroup_switch() (bsc#1227953).
    - CVE-2022-48789: nvme-tcp: fix possible use-after-free in transport error_recovery work (bsc#1228000).
    - CVE-2022-48790: nvme: fix a possible use-after-free in controller reset during load (bsc#1227941).
    - CVE-2024-41000: block/ioctl: prefer different overflow check (bsc#1227867).
    - CVE-2024-44948: x86/mtrr: Check if fixed MTRRs exist before saving them (bsc#1230174).
    - CVE-2022-48788: nvme-rdma: fix possible use-after-free in transport error_recovery work (bsc#1227952).
    - CVE-2024-45008: Input: MT - limit max slots (bsc#1230248).
    - CVE-2024-44987: ipv6: prevent UAF in ip6_send_skb() (bsc#1230185).
    - CVE-2024-44999: gtp: pull network headers in gtp_dev_xmit() (bsc#1230233).
    - CVE-2022-48943: KVM: x86/mmu: make apf token non-zero to fix bug (bsc#1229645).
    - CVE-2023-52915: media: dvb-usb-v2: af9035: fix missing unlock (bsc#1230270).
    - CVE-2022-48844: Bluetooth: hci_core: Fix leaking sent_cmd skb (bsc#1228068).
    - CVE-2024-43912: wifi: nl80211: disallow setting special AP channel widths (bsc#1229830)
    - CVE-2022-48791: Fix use-after-free for aborted TMF sas_task (bsc#1228002)
    - CVE-2024-43898: ext4: sanity check for NULL pointer after ext4_force_shutdown (bsc#1229753).
    - CVE-2024-42306: udf: Avoid using corrupted block bitmap buffer (bsc#1229362).
    - CVE-2024-42305: ext4: check dot and dotdot of dx_root before making dir indexed (bsc#1229363).
    - CVE-2024-42265: protect the fetch of ->fd[fd] in do_dup2() from mispredictions (bsc#1229334).
    - CVE-2024-44950: serial: sc16is7xx: fix invalid FIFO access with special register set (bsc#1230180).
    - CVE-2024-27024: net/rds: fix WARNING in rds_conn_connect_if_down (bsc#1223777).
    - CVE-2024-44954: ALSA: line6: Fix racy access to midibuf (bsc#1230176).
    - CVE-2024-44998: atm: idt77252: prevent use after free in dequeue_rx() (bsc#1230171).
    - CVE-2024-44952: driver core: Fix uevent_show() vs driver detach race  (bsc#1230178).
    - CVE-2021-47387: cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory (bsc#1225316).
    - CVE-2024-44969: s390/sclp: Prevent release of buffer in I/O (bsc#1230200).
    - CVE-2024-43904: Add null checks for 'stream' and 'plane' before dereferencing (bsc#1229768)
    - CVE-2024-43884: Add error handling to pair_device() (bsc#1229739)
    - CVE-2024-38596: af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg (bsc#1226846).
    - CVE-2024-42154: tcp_metrics: validate source addr length (bsc#1228507).


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 5.4.110-54.182. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-002 advisory.

    2024-09-12: CVE-2021-4442 was added to this advisory.

    An issue was discovered in the Linux kernel. Fastrpc_internal_invoke in drivers/misc/fastrpc.c does not     prevent user applications from sending kernel RPC messages. This is a related issue to CVE-2019-2308.
    (CVE-2021-28375)

    A flaw was found in the Linux kernel. The rtw_wx_set_scan driver allows writing beyond the end of the
    ->ssid[] array. The highest threat from this vulnerability is to data confidentiality and integrity as     well system availability. (CVE-2021-28660)

    The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

    A race condition flaw was found in get_old_root in fs/btrfs/ctree.c in the Linux kernel in btrfs file-     system. This flaw allows a local attacker with a special user privilege to cause a denial of service due     to not locking an extent buffer before a cloning operation. The highest threat from this vulnerability is     to system availability. (CVE-2021-28964)

    A flaw was found in the Linux kernel. On some Haswell CPUs, userspace applications (such as perf-fuzzer)     can cause a system crash because the PEBS status in a PEBS record is mishandled. (CVE-2021-28971)

    A denial-of-service (DoS) flaw was identified  in the Linux kernel due to an incorrect memory barrier in     xt_replace_table in net/netfilter/x_tables.c in the netfilter subsystem. (CVE-2021-29650)

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

    tcp: add sanity tests to TCP_QUEUE_SEQ (CVE-2021-4442)

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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989340 advisory.

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

    tcp: add sanity tests to TCP_QUEUE_SEQ

    Qingyu Li reported a syzkaller bug where the repro     changes RCV SEQ _after_ restoring data in the receive queue.

    mprotect(0x4aa000, 12288, PROT_READ)    = 0     mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000     mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =     0x20000000     mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000     socket(AF_INET6, SOCK_STREAM, IPPROTO_IP) = 3     setsockopt(3, SOL_TCP, TCP_REPAIR, [1], 4) = 0     connect(3, {sa_family=AF_INET6, sin6_port=htons(0), sin6_flowinfo=htonl(0), inet_pton(AF_INET6, ::1,     &sin6_addr), sin6_scope_id=0}, 28) = 0     setsockopt(3, SOL_TCP, TCP_REPAIR_QUEUE, [1], 4) = 0     sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=0x0000000000000003\0\0, iov_len=20}],     msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 20     setsockopt(3, SOL_TCP, TCP_REPAIR, [0], 4) = 0     setsockopt(3, SOL_TCP, TCP_QUEUE_SEQ, [128], 4) = 0     recvfrom(3, NULL, 20, 0, NULL, NULL)    = -1 ECONNRESET (Connection reset by peer)

    syslog shows:
    [  111.205099] TCP recvmsg seq # bug 2: copied 80, seq 0, rcvnxt 80, fl 0     [  111.207894] WARNING: CPU: 1 PID: 356 at net/ipv4/tcp.c:2343 tcp_recvmsg_locked+0x90e/0x29a0

    This should not be allowed. TCP_QUEUE_SEQ should only be used     when queues are empty.

    This patch fixes this case, and the tx path as well.

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-2025-987134 advisory.

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

    tcp: add sanity tests to TCP_QUEUE_SEQ

    Qingyu Li reported a syzkaller bug where the repro     changes RCV SEQ _after_ restoring data in the receive queue.

    mprotect(0x4aa000, 12288, PROT_READ)    = 0     mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000     mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =     0x20000000     mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000     socket(AF_INET6, SOCK_STREAM, IPPROTO_IP) = 3     setsockopt(3, SOL_TCP, TCP_REPAIR, [1], 4) = 0     connect(3, {sa_family=AF_INET6, sin6_port=htons(0), sin6_flowinfo=htonl(0), inet_pton(AF_INET6, ::1,     &sin6_addr), sin6_scope_id=0}, 28) = 0     setsockopt(3, SOL_TCP, TCP_REPAIR_QUEUE, [1], 4) = 0     sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=0x0000000000000003\0\0, iov_len=20}],     msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 20     setsockopt(3, SOL_TCP, TCP_REPAIR, [0], 4) = 0     setsockopt(3, SOL_TCP, TCP_QUEUE_SEQ, [128], 4) = 0     recvfrom(3, NULL, 20, 0, NULL, NULL)    = -1 ECONNRESET (Connection reset by peer)

    syslog shows:
    [  111.205099] TCP recvmsg seq # bug 2: copied 80, seq 0, rcvnxt 80, fl 0     [  111.207894] WARNING: CPU: 1 PID: 356 at net/ipv4/tcp.c:2343 tcp_recvmsg_locked+0x90e/0x29a0

    This should not be allowed. TCP_QUEUE_SEQ should only be used     when queues are empty.

    This patch fixes this case, and the tx path as well.

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.

ID	Name	Product	Family	Published	Updated	Severity
224283	Linux Distros Unpatched Vulnerability : CVE-2021-4442	Nessus	Misc.	3/5/2025	1/14/2026	medium
155219	RHEL 8 : kernel (RHSA-2021:4356)	Nessus	Red Hat Local Security Checks	11/11/2021	8/15/2025	high
208672	SUSE SLES12 Security Update : kernel (SUSE-SU-2024:3566-1)	Nessus	SuSE Local Security Checks	10/10/2024	1/6/2026	high
160445	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-002)	Nessus	Amazon Linux Local Security Checks	5/2/2022	2/26/2026	high
273223	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989340)	Nessus	Unity Linux Local Security Checks	11/5/2025	11/5/2025	medium
268133	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987134)	Nessus	Unity Linux Local Security Checks	10/7/2025	10/15/2025	medium

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