{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90333","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.803Z","datePublished":"2026-09-17T16:08:46.805Z","dateUpdated":"2026-09-17T16:08:46.805Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:08:46.805Z"},"descriptions":[{"lang":"en","value":"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 (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()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["Documentation/admin-guide/device-mapper/dm-ima.rst","Documentation/admin-guide/device-mapper/dm-integrity.rst","drivers/md/dm-integrity.c"],"versions":[{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"6228722c27304e4682cddc1fede03898f87e4414","status":"affected","versionType":"git"},{"version":"84597a44a9d86ac949900441cea7da0af0f2f473","lessThan":"68c5c42567bc462139128968ebbfadd0aefff519","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["Documentation/admin-guide/device-mapper/dm-ima.rst","Documentation/admin-guide/device-mapper/dm-integrity.rst","drivers/md/dm-integrity.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775"},{"url":"https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414"},{"url":"https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519"}],"title":"dm-integrity: replace forgeable discard filler with a keyed sector marker","x_generator":{"engine":"bippy-1.2.0"}}}}