CVE-2026-64053

CVE CVE-2026-64053EUVD EUVD-2026-45626Published 2026-07-19T15:39:35.000ZLast changed 2026-08-05T12:38:43.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: block: don't overwrite bip_vcnt in bio_integrity_copy_user() bio_integrity_add_page() already sets bip_vcnt to 1 for the bounce segment. Overwriting it with nr_vecs breaks bip_vcnt <= bip_max_vcnt on WRITE (bip_max_vcnt is 1), so the gap-merge checks in block/blk.h read past the bip_vec[] flex array. On READ the read is in bounds but lands on a saved user bvec instead of the bounce. The line was added for split propagation, but bio_integrity_clone() doesn't copy bip_vcnt and BIP_CLONE_FLAGS excludes BIP_COPY_USER.

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: 6.12.92; 3991657ae7074c3c497bf095093178bed37ea1b4 <0d48654af4d1390c888389206cc13b51b82c30e6; patch: 0; 6.11; 3991657ae7074c3c497bf095093178bed37ea1b4 <d18160c9525c63c203656fefd847e94b538cd4a4; patch: 7.0.11; 3991657ae7074c3c497bf095093178bed37ea1b4 <066be1439593a381b1a29663becfcfe0c92363e7; patch: 7.1; 3991657ae7074c3c497bf095093178bed37ea1b4 <637ad3a56a3b889527d1dacea6fea2a8bd648140; patch: 6.18.34

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

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Linux — Linux

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