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Message-ID: <2025120910-CVE-2025-40331-ee3c@gregkh> Date: Tue, 9 Dec 2025 13:10:13 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-40331: sctp: Prevent TOCTOU out-of-bounds write From: Greg Kroah-Hartman <gregkh@...nel.org> 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). The Linux kernel CVE team has assigned CVE-2025-40331 to this issue. Affected and fixed versions =========================== Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 5.4.302 with commit b106a68df0650b694b254427cd9250c04500edd3 Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 5.10.247 with commit 3006959371007fc2eae4a078f823c680fa52de1a Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 5.15.197 with commit 72e3fea68eac8d088e44c3dd954e843478e9240e Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 6.1.159 with commit 584307275b2048991b2e8984962189b6cc0a9b85 Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 6.6.117 with commit c9119f243d9c0da3c3b5f577a328de3e7ffd1b42 Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 6.12.58 with commit 2fe08fcaacb7eb019fa9c81db39b2214de216677 Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 6.17.8 with commit 89eac1e150dbd42963e13d23828cb8c4e0763196 Issue introduced in 4.7 with commit 8f840e47f190cbe61a96945c13e9551048d42cef and fixed in 6.18 with commit 95aef86ab231f047bb8085c70666059b58f53c09 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2025-40331 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/sctp/diag.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: 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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