CVE-2026-90333dm-integrity: replace forgeable discard filler with a keyed sector marker
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: dm-integrity: replace forgeable discard filler with a keyed sector marker The discard-block check in dm_integrity_rw_tag() treats a stored tag of all 0xf6 bytes (DISCARD_FILLER) as proof a block was discarded and skips HMAC verification. allow_discards is only accepted in dm-integrity's standalone mode. An attacker with raw write access to the backing device, but without the integrity key, can stamp any block with an all-0xf6 tag and have it served as authentic. Add a new "allow_discards_keyed" target argument that marks discarded blocks with a keyed checksum of (salt || sector) instead, computed by integrity_discard_checksum().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 84597a44a9d86ac949900441cea7da0af0f2f473 builds before 5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775; from 84597a44a9d86ac949900441cea7da0af0f2f473 before 6228722c27304e4682cddc1fede03898f87e4414; 84597a44a9d86ac949900441cea7da0af0f2f473 builds before 68c5c42567bc462139128968ebbfadd0aefff519 | CNA record |
References
- https://git.kernel.org/stable/c/5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775
- https://git.kernel.org/stable/c/6228722c27304e4682cddc1fede03898f87e4414
- https://git.kernel.org/stable/c/68c5c42567bc462139128968ebbfadd0aefff519
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.