{"cve":"CVE-2026-90333","nvd":{"published":"2026-09-17T17:17:31.830","modified":"2026-10-21T13:20:51.030","status":"Received","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().","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/388c3f6496bb8083576d989e6d249ba9807c6b0b","https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775","https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414","https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-90333","score":0.00174,"percentile":0.06839,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}