{"api_version":"1","generated_at":"2026-09-17T23:44:44+00:00","cve":"CVE-2026-90333","urls":{"html":"https://cve.report/CVE-2026-90333","api":"https://cve.report/api/cve/CVE-2026-90333.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90333","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90333"},"summary":{"title":"dm-integrity: replace forgeable discard filler with a keyed sector marker","description":"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().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:31","updated_at":"2026-09-17 17:17:31"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414","name":"https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519","name":"https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","name":"https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90333","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90333","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84597a44a9d86ac949900441cea7da0af0f2f473 5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84597a44a9d86ac949900441cea7da0af0f2f473 6228722c27304e4682cddc1fede03898f87e4414 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84597a44a9d86ac949900441cea7da0af0f2f473 68c5c42567bc462139128968ebbfadd0aefff519 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["Documentation/admin-guide/device-mapper/dm-ima.rst","Documentation/admin-guide/device-mapper/dm-integrity.rst","drivers/md/dm-integrity.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","status":"affected","version":"84597a44a9d86ac949900441cea7da0af0f2f473","versionType":"git"},{"lessThan":"6228722c27304e4682cddc1fede03898f87e4414","status":"affected","version":"84597a44a9d86ac949900441cea7da0af0f2f473","versionType":"git"},{"lessThan":"68c5c42567bc462139128968ebbfadd0aefff519","status":"affected","version":"84597a44a9d86ac949900441cea7da0af0f2f473","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["Documentation/admin-guide/device-mapper/dm-ima.rst","Documentation/admin-guide/device-mapper/dm-integrity.rst","drivers/md/dm-integrity.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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()."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:46.805Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90333","datePublished":"2026-09-17T16:08:46.805Z","dateReserved":"2026-09-11T19:38:34.803Z","dateUpdated":"2026-09-17T16:08:46.805Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:31","lastModifiedDate":"2026-09-17 17:17:31","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90333","Ordinal":"1","Title":"dm-integrity: replace forgeable discard filler with a keyed sect","CVE":"CVE-2026-90333","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90333","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"dm-integrity: replace forgeable discard filler with a keyed sect"}]}}}