CVE-2026-64053

7.8 Élevée

Publiée le 19/07/2026 à 18:17 · Modifiée le 19/10/2026 à 23:17 · Modifiée · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

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.

Traduire en français

Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.8 Élevée	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-125

Références

https://git.kernel.org/stable/c/066be1439593a381b1a29663becfcfe0c92363e7 Patch
https://git.kernel.org/stable/c/0d48654af4d1390c888389206cc13b51b82c30e6 Patch
https://git.kernel.org/stable/c/637ad3a56a3b889527d1dacea6fea2a8bd648140 Patch
https://git.kernel.org/stable/c/d18160c9525c63c203656fefd847e94b538cd4a4 Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories