xsk: Use a 32-bit compare in xsk_map_gen_lookup (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 11 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: xsk: Use a 32-bit compare in xsk_map_gen_lookup xsk_map_gen_lookup() loads a u32 key and compares it with max_entries using BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a max_entries value of 0x80000000 or higher becomes a threshold larger than every zero-extended 32-bit key. An out-of-range index then skips the bounds check and the generated lookup reads past xsk_map[]. Compare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.
References
- https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d
- https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0
- https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c
- https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c
- https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363
- https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc
- https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24
- https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814
European references
- ENISA EUVD · EUVD-2026-103545
- GCVE · GCVE-0-2026-98631
CERT-FR advisories
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected e65650f291ee72fc578d6346080fc4699204ef2c < c6d5c582d55a8f229d75e98d62eaa065b0deb18d ; affected e65650f291ee72fc578d6346080fc4699204ef2c < 227ec890559e922e235eb543646e3bf0bd8269b0 ; affected e65650f291ee72fc578d6346080fc4699204ef2c < 11d9be35c1f4233798e99be98bc474f83a254c6c ; affected e65650f291ee72fc578d6346080fc4699204ef2c < 123f90f394ca404ab8796a7c8072ff7fa5b65a9c ; affected e65650f291ee72fc578d6346080fc4699204ef2c < 36461e58f88a1b723f86693f437ac12e60ff4363 ; affected e65650f291ee72fc578d6346080fc4699204ef2c < b5c0cff0c5331582ab01c4c423731453a8381acc |
| Linux · Linux | affected 5.5 ; unaffected 0 < 5.5 ; unaffected 5.10.271 ≤ 5.10.* ; unaffected 5.15.222 ≤ 5.15.* ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |