In the Linux kernel, the following vulnerability has been resolved: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL The SCTP_SENDALL path in sctp_sendmsg() iterates ep->asocs with list_for_each_entry_safe(), which caches the next entry in @tmp before the loop body runs. The body calls sctp_sendmsg_to_asoc(), which may drop the socket lock inside sctp_wait_for_sndbuf(). While the lock is dropped, another thread can SCTP_SOCKOPT_PEELOFF the association cached in @tmp, migrating it to a new endpoint via sctp_sock_migrate() (list_del_init() + list_add_tail() to newep->asocs), and optionally close the new socket which frees the association via kfree_rcu(). The cached @tmp can also be freed by a network ABORT for that association, processed in softirq while the lock is dropped. sctp_wait_for_sndbuf() revalidates @asoc (the current entry) on re-lock via the "sk != asoc->base.sk" and "asoc->base.dead" checks, but nothing revalidates @tmp. After a successful return, the iterator advances to the stale @tmp, yielding either a use-after-free (if the peeled socket was closed) or a list-walk onto the new endpoint's list head (type confusion of &newep->asocs as a struct sctp_association *). Both are reachable from CapEff=0; the type-confusion path gives controlled indirect call via the outqueue.sched->init_sid pointer. Fix by re-deriving @tmp from @asoc after sctp_sendmsg_to_asoc() returns. @asoc is known to still be on ep->asocs at that point: the only callers that list_del an association from ep->asocs are sctp_association_free() (which sets asoc->base.dead) and sctp_assoc_migrate() (which changes asoc->base.sk), and sctp_wait_for_sndbuf() checks both under the lock before any successful return; a tripped check propagates as err < 0 and the loop bails before the re-derive. The SCTP_ABORT path in sctp_sendmsg_check_sflags() returns 0 and the loop hits 'continue' before sctp_sendmsg_to_asoc() is ever called, so the @tmp cached by list_for_each_entry_safe() still covers the lock-held free that ba59fb027307 ("sctp: walk the list of asoc safely") was added for.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:27735 advisory.

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

    Security Fix(es):

    * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

    * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

    * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

    * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs     (CVE-2026-46323)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

    Bug Fix(es) and Enhancement(s):

    * [octeon_ep]: Verify VF ID [rhel-9.4.z] (JIRA:RHEL-117605)

    * libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-9.4.z] (JIRA:RHEL-168925)

    * [RHEL-9] Performance impact of CVE-2025-38085 [rhel-9.4.z] (JIRA:RHEL-161144)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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 Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:27731 advisory.

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

    Security Fix(es):

    * kernel: Linux kernel: Use-after-free in BPF sockmap can lead to denial of service and privilege     escalation (CVE-2025-38154)

    * kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

    * kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

    * kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

    * kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state     (CVE-2026-23136)

    * kernel: can: isotp: fix tx.buf use-after-free in isotp_sendmsg() (CVE-2026-31474)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)

    * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs     (CVE-2026-46323)

    * kernel: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows (CVE-2026-43501)

    * kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list (CVE-2026-45898)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

    Bug Fix(es) and Enhancement(s):

    * libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-10.0.z] (JIRA:RHEL-168933)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26535 advisory.

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

    Security Fix(es):

    * kernel: geneve: Fix use-after-free in geneve_find_dev(). (CVE-2025-21858)

    * kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)

    * kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

    * kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

    * kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

    * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

    * kernel: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats (CVE-2025-68800)

    * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

    * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)

    * kernel: Linux kernel: Denial of Service due to a deadlock in hugetlb folio migration (CVE-2026-23097)

    * kernel: ALSA: aloop: Fix racy access at PCM trigger (CVE-2026-23191)

    * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

    * kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037)

    * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    Bug Fix(es) and Enhancement(s):

    * NFS client hangs while returning delegations (JIRA:RHEL-112276)

    * Rhel backport of upstream commit i40e: avoid redundant VF link state update (JIRA:RHEL-141908)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26515 advisory.

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

    Security Fix(es):

    * kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

    * kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

    * kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

    * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

    * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)

    * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

    * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

    * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

    * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

    * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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 Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26563 advisory.

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

    Security Fix(es):

    * kernel: geneve: Fix use-after-free in geneve_find_dev(). (CVE-2025-21858)

    * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

    * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)

    * kernel: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats (CVE-2025-68800)

    * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

    * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

    * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

    * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26462 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

    * kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

    * kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

    * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

    * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)

    * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

    * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

    * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

    * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

    * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

    * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)

    * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

    * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

    * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116)

    * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

    * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

    * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)

    * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    * kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

    * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1816 advisory.

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

    bonding: fix use-after-free due to enslave fail after slave array update (CVE-2026-23171)

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

    mm/pagewalk: fix race between concurrent split and refault (CVE-2026-31456)

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

    mm/userfaultfd: fix hugetlb fault mutex hash calculation (CVE-2026-31575)

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

    fuse: reject oversized dirents in page cache (CVE-2026-31694)

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

    net/packet: fix TOCTOU race on mmap'd vnet_hdr in tpacket_snd() (CVE-2026-31700)

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

    smb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path (CVE-2026-31708)

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

    smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)

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

    fs/ntfs3: validate rec->used in journal-replay file record check (CVE-2026-31716)

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

    Buffer overflow in drivers/xen/sys-hypervisor.c (CVE-2026-31786)

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

    xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)

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

    net: af_key: zero aligned sockaddr tail in PF_KEY exports (CVE-2026-43088)

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

    x86: shadow stacks: proper error handling for mmap lock (CVE-2026-43109)

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

    smb: client: require a full NFS mode SID before reading mode bits (CVE-2026-43350)

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

    btrfs: fix btrfs_ioctl_space_info() slot_count TOCTOU which can lead to info-leak (CVE-2026-46159)

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

    btrfs: fix double free in create_space_info_sub_group() error path (CVE-2026-46164)

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

    vsock/virtio: fix empty payload in tap skb for non-linear buffers (CVE-2026-46207)

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

    drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CVE-2026-46209)

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

    vsock/virtio: fix accept queue count leak on transport mismatch (CVE-2026-46214)

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

    sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

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

    vsock: fix buffer size clamping order (CVE-2026-46234)

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

    media: rc: xbox_remote: heed DMA restrictions (CVE-2026-46236)

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.

An update of the linux package has been released.

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

  - sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL The SCTP_SENDALL path in     sctp_sendmsg() iterates ep->asocs with list_for_each_entry_safe(), which caches the next entry in @tmp     before the loop body runs. The body calls sctp_sendmsg_to_asoc(), which may drop the socket lock inside     sctp_wait_for_sndbuf(). While the lock is dropped, another thread can SCTP_SOCKOPT_PEELOFF the association     cached in @tmp, migrating it to a new endpoint via sctp_sock_migrate() (list_del_init() + list_add_tail()     to newep->asocs), and optionally close the new socket which frees the association via kfree_rcu(). The     cached @tmp can also be freed by a network ABORT for that association, processed in softirq while the lock     is dropped. sctp_wait_for_sndbuf() revalidates @asoc (the current entry) on re-lock via the sk !=     asoc->base.sk and asoc->base.dead checks, but nothing revalidates @tmp. After a successful return, the     iterator advances to the stale @tmp, yielding either a use-after-free (if the peeled socket was closed) or     a list-walk onto the new endpoint's list head (type confusion of &newep->asocs as a struct     sctp_association *). Both are reachable from CapEff=0; the type-confusion path gives controlled indirect     call via the outqueue.sched->init_sid pointer. Fix by re-deriving @tmp from @asoc after     sctp_sendmsg_to_asoc() returns. @asoc is known to still be on ep->asocs at that point: the only callers     that list_del an association from ep->asocs are sctp_association_free() (which sets asoc->base.dead) and     sctp_assoc_migrate() (which changes asoc->base.sk), and sctp_wait_for_sndbuf() checks both under the lock     before any successful return; a tripped check propagates as err < 0 and the loop bails before the re-     derive. The SCTP_ABORT path in sctp_sendmsg_check_sflags() returns 0 and the loop hits 'continue' before     sctp_sendmsg_to_asoc() is ever called, so the @tmp cached by list_for_each_entry_safe() still covers the     lock-held free that ba59fb027307 (sctp: walk the list of asoc safely) was added for. (CVE-2026-46227)

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

ID	Name	Product	Family	Severity
321943	RHEL 9 : kernel (RHSA-2026:27735)	Nessus	Red Hat Local Security Checks	high
321938	RHEL 10 : kernel (RHSA-2026:27731)	Nessus	Red Hat Local Security Checks	high
321564	RHEL 8 : kernel (RHSA-2026:26535)	Nessus	Red Hat Local Security Checks	high
321359	RHEL 9 : kernel (RHSA-2026:26515)	Nessus	Red Hat Local Security Checks	high
321352	RHEL 8 : kernel (RHSA-2026:26563)	Nessus	Red Hat Local Security Checks	high
321327	RHEL 9 : kernel-rt (RHSA-2026:26462)	Nessus	Red Hat Local Security Checks	high
319865	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1816)	Nessus	Amazon Linux Local Security Checks	high
318769	Photon OS 4.0: Linux PHSA-2026-4.0-1028	Nessus	PhotonOS Local Security Checks	high
317582	Linux Distros Unpatched Vulnerability : CVE-2026-46227	Nessus	Misc.	high

Detections

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CVE-2026-46227

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Tenable Plugins

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