CVE-2026-93785
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedSep 24, 2026
First seenSep 24, 2026
How to fix
Update
- Linux Linuxeeac976b74b4f697cfc517187b7cbfd72652dbbc, 125b05ac8ca8758950e4369c1542d57a162f504c, 945f6cde6bcf8f08f6fa5df8882b1b9582e55efa, 3a4a34a732e8a08309eed0a74314dbd9f2f1c972, 6cfeef221ac00d63c07f6122f58e6159bde69ca0, 8b12f65d7caf16d124098cb4895a203367d35b57, 455488cd5054bcc59db40fa1cc2c004031a5b2a5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < eeac976b74b4f697cfc517187b7cbfd72652dbbc, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 125b05ac8ca8758950e4369c1542d57a162f504c, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 945f6cde6bcf8f08f6fa5df8882b1b9582e55efa, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 3a4a34a732e8a08309eed0a74314dbd9f2f1c972, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 6cfeef221ac00d63c07f6122f58e6159bde69ca0, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 8b12f65d7caf16d124098cb4895a203367d35b57, 21fed0d5b763b94a7d1568c27d0cce892ab8d43e ≤ v < 455488cd5054bcc59db40fa1cc2c004031a5b2a5, 3.2 | eeac976b74b4f697cfc517187b7cbfd72652dbbc, 125b05ac8ca8758950e4369c1542d57a162f504c, 945f6cde6bcf8f08f6fa5df8882b1b9582e55efa, 3a4a34a732e8a08309eed0a74314dbd9f2f1c972, 6cfeef221ac00d63c07f6122f58e6159bde69ca0, 8b12f65d7caf16d124098cb4895a203367d35b57, 455488cd5054bcc59db40fa1cc2c004031a5b2a5 |
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