{"id":"CVE-2026-90333","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: replace forgeable discard filler with a keyed sector marker\n\nThe discard-block check in dm_integrity_rw_tag() treats a stored tag\nof all 0xf6 bytes (DISCA…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: replace forgeable discard filler with a keyed sector marker\n\nThe discard-block check in dm_integrity_rw_tag() treats a stored tag\nof all 0xf6 bytes (DISCA…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 84597a44a9d86ac949900441cea7da0af0f2f473 < 5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","Linux >= 84597a44a9d86ac949900441cea7da0af0f2f473 < 6228722c27304e4682cddc1fede03898f87e4414","Linux >= 84597a44a9d86ac949900441cea7da0af0f2f473 < 68c5c42567bc462139128968ebbfadd0aefff519","Linux 5.7"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:31.830","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90333","references":[{"url":"https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.819Z","epss":0.00166,"epssPercentile":0.06278,"slug":"CVE-2026-90333","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: replace forgeable discard filler with a keyed sector marker\n\nThe discard-block check in dm_integrity_rw_tag() treats a stored tag\nof all 0xf6 bytes (DISCARD_FILLER) as proof a block was discarded and\nskips HMAC verification. allow_discards is only accepted in\ndm-integrity's standalone mode. An attacker with raw write access to\nthe backing device, but without the integrity key, can stamp any block\nwith an all-0xf6 tag and have it served as authentic.\n\nAdd a new \"allow_discards_keyed\" target argument that marks discarded\nblocks with a keyed checksum of (salt || sector) instead, computed by\nintegrity_discard_checksum().\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":[]}