sctp: Prevent TOCTOU out-of-bounds write
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
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).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00188 8th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.302, 5.10.247, 5.15.197 +5Red Hat: 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40331
- 2026-10-03 Alias added: GHSA-c4fm-qmm5-xqx8
References
Other 8
- https://git.kernel.org/stable/c/b106a68df0650b694b254427cd9250c04500edd3
- https://git.kernel.org/stable/c/3006959371007fc2eae4a078f823c680fa52de1a
- https://git.kernel.org/stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e
- https://git.kernel.org/stable/c/584307275b2048991b2e8984962189b6cc0a9b85
- https://git.kernel.org/stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42
- https://git.kernel.org/stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677
- https://git.kernel.org/stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196
- https://git.kernel.org/stable/c/95aef86ab231f047bb8085c70666059b58f53c09
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- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2025-40331 · CVE Program
- CVE-2025-40331 · NVD
- FIRST EPSS
- GHSA-c4fm-qmm5-xqx8 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40331 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences