{"id":"CVE-2026-93785","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX.  Accepting a larger key payload…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < eeac976b74b4f697cfc517187b7cbfd72652dbbc","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 125b05ac8ca8758950e4369c1542d57a162f504c","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 945f6cde6bcf8f08f6fa5df8882b1b9582e55efa","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 3a4a34a732e8a08309eed0a74314dbd9f2f1c972","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 6cfeef221ac00d63c07f6122f58e6159bde69ca0","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 8b12f65d7caf16d124098cb4895a203367d35b57","Linux >= 21fed0d5b763b94a7d1568c27d0cce892ab8d43e < 455488cd5054bcc59db40fa1cc2c004031a5b2a5","Linux 3.2"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:48.050","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93785","references":[{"url":"https://git.kernel.org/stable/c/125b05ac8ca8758950e4369c1542d57a162f504c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3a4a34a732e8a08309eed0a74314dbd9f2f1c972","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/945f6cde6bcf8f08f6fa5df8882b1b9582e55efa","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eeac976b74b4f697cfc517187b7cbfd72652dbbc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00173,"epssPercentile":0.0662,"ingestedAt":"2026-09-24T16:47:15.903Z","slug":"CVE-2026-93785","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX.  Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key->datalen consistent with the stored data for both inline\nand separately allocated idmap payloads.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}