CVE-2025-40331 json
sctp: Prevent TOCTOU out-of-bounds write
published 11mo ago modified 26d ago also EUVD-2025-201871
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: Prevent TOCTOU out-of-bounds write
For the following path not holding the sock lock,
sctp_diag_dump() -> sctp_for_each_endpoint() -> sctp_ep_dump()
make sure not to exceed bounds in case the address list has grown between buffer allocation (time-of-check) and write (time-of-use).
Patch / fix
- Linux Linux 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
- linux Debian 12 6.1.159-1
- linux Debian 13 6.12.63-1
- linux Debian 14 6.17.8-1
debian advisories DEBIAN-CVE-2025-40331
- linux Ubuntu 22.04 LTS 5.15.0-173.183
- linux Ubuntu 24.04 LTS 6.8.0-106.106
- linux Ubuntu 25.10 6.17.0-14.14
- linux-aws Ubuntu 22.04 LTS 5.15.0-1103.110
- linux-aws Ubuntu 24.04 LTS 6.8.0-1050.53
- linux-aws Ubuntu 25.10 6.17.0-1007.7
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1103.112
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1052.55
ubuntu advisories UBUNTU-CVE-2025-40331
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
- kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
- kernel-64kb SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS, SLE High Performance Computing 15 SP4-ESPOS 5.14.21-150400.24.194.1
- kernel-syms SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
- kernel-source SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
- kernel-default SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 5.14.21-150400.24.194.1
- kernel-obs-build SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
- kernel-default-base SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +3 more 5.14.21-150400.24.194.1.150400.24.98.3
suse advisories SUSE-SU-2026:20845-1SUSE-SU-2026:20876-1SUSE-SU-2026:0617-1SUSE-SU-2026:20477-1SUSE-SU-2026:20498-1SUSE-SU-2026:0411-1
- kernel-rt openSUSE Leap 16.0 6.12.0-160000.9.1
- dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-64kb openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-syms openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-azure openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-source openSUSE Leap 16.0 6.12.0-160000.9.1
- kernel-default openSUSE Leap 16.0 6.12.0-160000.9.1
opensuse advisories openSUSE-SU-2026:20145-1
- git.kernel.org/stable/c/b106a68df0650b694b254427cd9250c04500edd3 commit
- git.kernel.org/stable/c/3006959371007fc2eae4a078f823c680fa52de1a commit
- git.kernel.org/stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e commit
- git.kernel.org/stable/c/584307275b2048991b2e8984962189b6cc0a9b85 commit
- git.kernel.org/stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42 commit
- git.kernel.org/stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677 commit
- git.kernel.org/stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196 commit
- git.kernel.org/stable/c/95aef86ab231f047bb8085c70666059b58f53c09 commit
Is CVE-2025-40331 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerVendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2025-40331 updated cvss 4.7
kernel: sctp: Prevent TOCTOU out-of-bounds write
-
Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelaffected: no fix available
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Linux Linux
Classification
- Technology feeds
References
- git.kernel.org /stable/c/b106a68df0650b694b254427cd9250c04500edd3
- git.kernel.org /stable/c/3006959371007fc2eae4a078f823c680fa52de1a
- git.kernel.org /stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e
- git.kernel.org /stable/c/584307275b2048991b2e8984962189b6cc0a9b85
- git.kernel.org /stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42
- git.kernel.org /stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677
- git.kernel.org /stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196
- git.kernel.org /stable/c/95aef86ab231f047bb8085c70666059b58f53c09
Sources
- CVE List CVE-2025-40331
- NVD CVE-2025-40331
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.