Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3991657ae7074c3c497bf095093178bed37ea1b4 before d18160c9525c63c203656fefd847e94b538cd4a4; affected 3991657ae7074c3c497bf095093178bed37ea1b4 before 0d48654af4d1390c888389206cc13b51b82c30e6; affected 3991657ae7074c3c497bf095093178bed37ea1b4 before 066be1439593a381b1a29663becfcfe0c92363e7; affected 3991657ae7074c3c497bf095093178bed37ea1b4 before 637ad3a56a3b889527d1dacea6fea2a8bd648140 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d18160c9525c63c203656fefd847e94b538cd4a4
- https://git.kernel.org/stable/c/0d48654af4d1390c888389206cc13b51b82c30e6
- https://git.kernel.org/stable/c/066be1439593a381b1a29663becfcfe0c92363e7
- https://git.kernel.org/stable/c/637ad3a56a3b889527d1dacea6fea2a8bd648140
ADP enrichment
No English description supplied.
No references supplied.