CVE-2026-90052

CVE CVE-2026-90052EUVD EUVD-2026-81913Published 2026-09-17T16:05:38.000ZLast changed 2026-09-18T17:52:46.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix buffer overflow with keyed discard Since commit 68c5c42567bc ("dm-integrity: replace forgeable discard filler with a keyed sector marker"), integrity_metadata computes a checksum for every discarded block into the "checksums" buffer. integrity_sector_checksum always writes the whole digest. So if the tag size is smaller than the digest size, the checksum of the last block that fits into the buffer is written past the end of it. For example, with hmac(sha256) and tag size 16, a 4MiB discard writes 16 bytes past the kmalloc'ed page. Fix this by subtracting extra_space from the buffer size when computing max_blocks, like we do for writes.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 7.3-rc2; 5c58ea19a909ef6bed4f0f824e9cd7e30d7e4775 <9988c1c9e0d1c78391e3d8e2817beb667470c76f; patch: 0; 6228722c27304e4682cddc1fede03898f87e4414 <dd08a645195f410f2dcaa40de379a45ce110e873; 7.3-rc1; 68c5c42567bc462139128968ebbfadd0aefff519 <59e6f919d77d72ec79cbf171256f2f7819737580

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.