[ CVE-2026-93785 · Published 24 Sep 2026 ]
Vulnerability in Linux
[ Description ]Official description
In the Linux kernel, the following vulnerability has been resolved: cifs: validate idmap key payload length The cifs.idmap key type stores its payload length in key->datalen, which is limited to U16_MAX. Accepting a larger key payload truncates the recorded length and can make later users interpret the payload using inconsistent bounds. Reject oversized preparsed payloads before allocating or copying them. This keeps key->datalen consistent with the stored data for both inline and separately allocated idmap payloads.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1289
Multiple vulnerabilities in the Debian LTS Linux kernel Translated from French
Multiple vulnerabilities have been discovered in the Debian LTS Linux kernel. Some of them allow an attacker to cause privilege escalation, a breach of data confidentiality and denial of service.
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CERT-FRCERTFR-2026-AVI-1253
Multiple vulnerabilities in the Debian Linux kernel Translated from French
Multiple vulnerabilities have been discovered in the Debian Linux kernel. Some of them allow an attacker to cause privilege escalation, a breach of data confidentiality and denial of service.
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BSI CERT-BundWID-SEC-2026-3579
Linux Kernel: Multiple vulnerabilities Translated from German
[ References ]References
- git.kernel.org/stable/c/125b05ac8ca8758950e4369c1542d57a162f504c
- git.kernel.org/stable/c/3a4a34a732e8a08309eed0a74314dbd9f2f1c972
- git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5
- git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0
- git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57
- git.kernel.org/stable/c/945f6cde6bcf8f08f6fa5df8882b1b9582e55efa
- git.kernel.org/stable/c/eeac976b74b4f697cfc517187b7cbfd72652dbbc