CVE-2026-93785
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.
Affected versions
Linux kernel versions
3.2
and later are affected. Fixed in
5.10.271,
5.15.222,
6.1.189,
6.6.158,
6.12.111,
6.18.53,
7.2
and their respective stable series.
References
7 totalFrequently asked questions
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What is CVE-2026-93785?
CVE-2026-93785 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.2 onward and has been patched in 5.10.271, 5.15.222, 6.1.189 and others. CVE-2026-93785 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-93785?
Yes. CVE-2026-93785 has been patched. Fixed versions include 5.10.271, 5.15.222, 6.1.189 and others. If you are running Linux kernel 3.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-93785 actively exploited?
No. CVE-2026-93785 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.