CVE-2025-40331
Published Dec 9, 2025
Modified Apr 15, 2026
Description
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).
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References
Other References
https://git.kernel.org/stable/c/2fe08fcaacb7eb019fa9c81db39b2214de216677
https://git.kernel.org/stable/c/3006959371007fc2eae4a078f823c680fa52de1a
https://git.kernel.org/stable/c/584307275b2048991b2e8984962189b6cc0a9b85
https://git.kernel.org/stable/c/72e3fea68eac8d088e44c3dd954e843478e9240e
https://git.kernel.org/stable/c/89eac1e150dbd42963e13d23828cb8c4e0763196
https://git.kernel.org/stable/c/95aef86ab231f047bb8085c70666059b58f53c09
https://git.kernel.org/stable/c/b106a68df0650b694b254427cd9250c04500edd3
https://git.kernel.org/stable/c/c9119f243d9c0da3c3b5f577a328de3e7ffd1b42
Frequently Asked Questions
What is CVE-2025-40331? +
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).
How do I check if I'm vulnerable to CVE-2025-40331? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.