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CVE-2026-93785

Unknown

Last modified

CVE-2026-93785 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 6cfeef221ac00d63c07f6122f58e6159bde69ca0; >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 8b12f65d7caf16d124098cb4895a203367d35b57; >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 455488cd5054bcc59db40fa1cc2c004031a5b2a5
LinuxLinux3.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-93785?
Severity scoring for CVE-2026-93785 is pending analysis.
How do I fix CVE-2026-93785?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST