In the Linux kernel, the following vulnerability has been resolved: sctp: avoid NULL dereference when chunk data buffer is missing chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only. chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is non-NULL because of outer if() condition.

The remote Oracle Linux 10 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-50006 advisory.

    - xfrm: delete x->tunnel as we delete x (Sabrina Dubroca)   {CVE-2025-40215}

Tenable has extracted the preceding description block directly from the Oracle 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-0444 advisory.

    - libceph: fix potential use-after-free in have_mon_and_osd_map() (CKI Backport Bot) [RHEL-137395]     {CVE-2025-68285}
    - media: rc: fix races with imon_disconnect() (Kate Hsuan) [RHEL-124396] {CVE-2025-39993}
    - sctp: avoid NULL dereference when chunk data buffer is missing (CKI Backport Bot) [RHEL-133999]     {CVE-2025-40240}

Tenable has extracted the preceding description block directly from the Oracle 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-2026:0445 advisory.

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

    Security Fix(es):

    * kernel: HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() (CVE-2025-39806)

    * kernel: audit: fix out-of-bounds read in audit_compare_dname_path() (CVE-2025-39840)

    * kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory (CVE-2025-39883)

    * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)

    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-2026:0453 advisory.

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

    Security Fix(es):

    * kernel: HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() (CVE-2025-39806)

    * kernel: audit: fix out-of-bounds read in audit_compare_dname_path() (CVE-2025-39840)

    * kernel: mm: slub: avoid wake up kswapd in set_track_prepare (CVE-2025-39843)

    * kernel: net: phylink: add lock for serializing concurrent pl->phydev writes with resolver     (CVE-2025-39905)

    * kernel: iommufd: Fix race during abort for file descriptors (CVE-2025-39966)

    * kernel: tls: wait for pending async decryptions if tls_strp_msg_hold fails (CVE-2025-40176)

    * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)

    * kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)

    * kernel: usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths     (CVE-2025-68287)

    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-2026:0444 advisory.

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

    Security Fix(es):

    * kernel: media: rc: fix races with imon_disconnect() (CVE-2025-39993)

    * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)

    * kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() (CVE-2025-68285)

    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-2026:0443 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: media: rc: fix races with imon_disconnect() (CVE-2025-39993)

    * kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)

    * kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() (CVE-2025-68285)

    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 Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-0445 advisory.

    - HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() (CKI Backport Bot) [RHEL-124607]     {CVE-2025-39806}
    - sctp: avoid NULL dereference when chunk data buffer is missing (CKI Backport Bot) [RHEL-134001]     {CVE-2025-40240}
    - audit: fix out-of-bounds read in audit_compare_dname_path() (Richard Guy Briggs) [RHEL-119176]     {CVE-2025-39840}

Tenable has extracted the preceding description block directly from the Oracle 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 Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-0453 advisory.

    - usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths (CKI Backport Bot)     [RHEL-137150] {CVE-2025-68287}
    - drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CKI Backport Bot) [RHEL-134431]     {CVE-2025-40277}
    - net: phylink: add lock for serializing concurrent pl->phydev writes with resolver (CKI Backport Bot)     [RHEL-129812] {CVE-2025-39905}
    - sctp: avoid NULL dereference when chunk data buffer is missing (CKI Backport Bot) [RHEL-134010]     {CVE-2025-40240}
    - HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() (CKI Backport Bot) [RHEL-124610]     {CVE-2025-39806}
    - audit: fix out-of-bounds read in audit_compare_dname_path() (Richard Guy Briggs) [RHEL-119185]     {CVE-2025-39840}
    - iommufd: Fix race during abort for file descriptors (Eder Zulian) [RHEL-123789] {CVE-2025-39966}
    - mm: slub: avoid wake up kswapd in set_track_prepare (Audra Mitchell) [RHEL-125522] {CVE-2025-39843}
    - tls: wait for pending async decryptions if tls_strp_msg_hold fails (CKI Backport Bot) [RHEL-128866]     {CVE-2025-40176}

Tenable has extracted the preceding description block directly from the Oracle 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 Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4404 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4404-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                        Ben Hutchings     December 12, 2025                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : linux     Version        : 5.10.247-1     CVE ID         : CVE-2023-53498 CVE-2024-47666 CVE-2024-50143 CVE-2024-57947                      CVE-2025-21861 CVE-2025-21887 CVE-2025-22058 CVE-2025-23143                      CVE-2025-38678 CVE-2025-39866 CVE-2025-39869 CVE-2025-39876                      CVE-2025-39883 CVE-2025-39885 CVE-2025-39907 CVE-2025-39911                      CVE-2025-39913 CVE-2025-39923 CVE-2025-39937 CVE-2025-39945                      CVE-2025-39949 CVE-2025-39951 CVE-2025-39953 CVE-2025-39955                      CVE-2025-39964 CVE-2025-39967 CVE-2025-39968 CVE-2025-39969                      CVE-2025-39970 CVE-2025-39971 CVE-2025-39972 CVE-2025-39973                      CVE-2025-39980 CVE-2025-39985 CVE-2025-39986 CVE-2025-39987                      CVE-2025-39993 CVE-2025-39994 CVE-2025-39995 CVE-2025-39996                      CVE-2025-39998 CVE-2025-40001 CVE-2025-40006 CVE-2025-40011                      CVE-2025-40018 CVE-2025-40019 CVE-2025-40020 CVE-2025-40021                      CVE-2025-40022 CVE-2025-40026 CVE-2025-40027 CVE-2025-40029                      CVE-2025-40030 CVE-2025-40035 CVE-2025-40042 CVE-2025-40044                      CVE-2025-40048 CVE-2025-40049 CVE-2025-40053 CVE-2025-40055                      CVE-2025-40070 CVE-2025-40078 CVE-2025-40081 CVE-2025-40083                      CVE-2025-40087 CVE-2025-40088 CVE-2025-40105 CVE-2025-40106                      CVE-2025-40109 CVE-2025-40111 CVE-2025-40115 CVE-2025-40116                      CVE-2025-40118 CVE-2025-40121 CVE-2025-40125 CVE-2025-40127                      CVE-2025-40134 CVE-2025-40140 CVE-2025-40153 CVE-2025-40154                      CVE-2025-40167 CVE-2025-40173 CVE-2025-40178 CVE-2025-40183                      CVE-2025-40186 CVE-2025-40187 CVE-2025-40188 CVE-2025-40190                      CVE-2025-40194 CVE-2025-40197 CVE-2025-40198 CVE-2025-40200                      CVE-2025-40204 CVE-2025-40205 CVE-2025-40211 CVE-2025-40219                      CVE-2025-40220 CVE-2025-40223 CVE-2025-40231 CVE-2025-40233                      CVE-2025-40240 CVE-2025-40243 CVE-2025-40244 CVE-2025-40248                      CVE-2025-40254 CVE-2025-40257 CVE-2025-40258 CVE-2025-40259                      CVE-2025-40261 CVE-2025-40262 CVE-2025-40263 CVE-2025-40264                      CVE-2025-40269 CVE-2025-40271 CVE-2025-40273 CVE-2025-40275                      CVE-2025-40277 CVE-2025-40278 CVE-2025-40280 CVE-2025-40281                      CVE-2025-40282 CVE-2025-40283 CVE-2025-40304 CVE-2025-40306                      CVE-2025-40308 CVE-2025-40309 CVE-2025-40312 CVE-2025-40315                      CVE-2025-40317 CVE-2025-40319 CVE-2025-40321 CVE-2025-40322                      CVE-2025-40324 CVE-2025-40331 CVE-2025-40342     Debian Bug     : 1107479 1114557

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For Debian 11 bullseye, these problems have been fixed in version     5.10.247-1.  This version additionally includes many more bug fixes     from stable updates 5.10.245-5.10.247.  The broken pktcdvd driver has     also been disabled.

    We recommend that you upgrade your linux packages.

    For the detailed security status of linux please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/linux

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - sctp: avoid NULL dereference when chunk data buffer is missing chunk->skb pointer is dereferenced in the     if-block where it's supposed to be NULL only. chunk->skb can only be NULL if chunk->head_skb is not. Check     for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is     non-NULL because of outer if() condition. (CVE-2025-40240)

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

ID	Name	Product	Family	Severity
284515	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50006)	Nessus	Oracle Linux Local Security Checks	high
283568	Oracle Linux 8 : kernel (ELSA-2026-0444)	Nessus	Oracle Linux Local Security Checks	high
283527	RHEL 9 : kernel (RHSA-2026:0445)	Nessus	Red Hat Local Security Checks	high
283499	RHEL 10 : kernel (RHSA-2026:0453)	Nessus	Red Hat Local Security Checks	high
283490	RHEL 8 : kernel (RHSA-2026:0444)	Nessus	Red Hat Local Security Checks	high
283485	RHEL 8 : kernel-rt (RHSA-2026:0443)	Nessus	Red Hat Local Security Checks	high
282669	Oracle Linux 9 : kernel (ELSA-2026-0445)	Nessus	Oracle Linux Local Security Checks	high
282630	Oracle Linux 10 : kernel (ELSA-2026-0453)	Nessus	Oracle Linux Local Security Checks	high
278560	Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2025-28049)	Nessus	Oracle Linux Local Security Checks	medium
278559	Debian dla-4404 : ata-modules-5.10.0-35-armmp-di - security update	Nessus	Debian Local Security Checks	high
277494	Linux Distros Unpatched Vulnerability : CVE-2025-40240	Nessus	Misc.	high

Detections

Analytics

CVE-2025-40240

high

Tenable Plugins

high

high

high

high

high

high

high

high

medium

high

high