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CVE-2026-93785

UnknownEPSS 0.17%

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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.17%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < eeac976b74b4f697cfc517187b7cbfd72652dbbc; >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 125b05ac8ca8758950e4369c1542d57a162f504c; >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 945f6cde6bcf8f08f6fa5df8882b1b9582e55efa; >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e, < 3a4a34a732e8a08309eed0a74314dbd9f2f1c972; >= 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. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
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