CVE-2026-64053
- Source
- https://cve.org/CVERecord?id=CVE-2026-64053
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64053.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-64053
- Downstream
- Published
- 2026-07-19T15:39:35.854Z
- Modified
- 2026-07-22T03:32:07.656265722Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- block: don't overwrite bip_vcnt in bio_integrity_copy_user()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
block: don't overwrite bipvcnt in biointegritycopyuser()
biointegrityaddpage() already sets bipvcnt to 1 for the bounce segment. Overwriting it with nrvecs breaks bipvcnt <= bipmaxvcnt on WRITE (bipmaxvcnt 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 biointegrityclone() doesn't copy bipvcnt and BIPCLONEFLAGS excludes BIPCOPY_USER.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64053.json" }- References
-
- https://git.kernel.org/stable/c/066be1439593a381b1a29663becfcfe0c92363e7
- https://git.kernel.org/stable/c/0d48654af4d1390c888389206cc13b51b82c30e6
- https://git.kernel.org/stable/c/637ad3a56a3b889527d1dacea6fea2a8bd648140
- https://git.kernel.org/stable/c/d18160c9525c63c203656fefd847e94b538cd4a4
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64053.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64053
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced3991657ae7074c3c497bf095093178bed37ea1b4Fixedd18160c9525c63c203656fefd847e94b538cd4a4Fixed0d48654af4d1390c888389206cc13b51b82c30e6Fixed066be1439593a381b1a29663becfcfe0c92363e7Fixed637ad3a56a3b889527d1dacea6fea2a8bd648140