KVM: s390: pci: Validate AIBV and AISB before pinning guest pages (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Validate AIBV and AISB before pinning guest pages The AIBV holds one bit per MSI-X vector for a given function. The size of the bit vector is derived from the NOI and the AIBVO. If the size of the AIBV exceeds a single page boundary, then reject the request as we cannot safely pin the guest AIBV. Similarly reject the request if the AISB address is not 8-byte aligned as the architecture requires doubleword alignment for the summary bit address. Since the AISBO can address up to 64 bits, the size of the AISB can only be 8 bytes for the function. This also ensures the AISB doesn't exceed a single page boundary.
References
- https://git.kernel.org/stable/c/3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48
- https://git.kernel.org/stable/c/f00ef8efd41440129ccd88f4a1ebebf8d61d297f
- https://git.kernel.org/stable/c/15df7700dd99f8a37f5c6ed2dcf1e33009cdba47
- https://git.kernel.org/stable/c/b878ba7e28144c9a857bc847d31f3c45413450ac
- https://git.kernel.org/stable/c/fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528
- https://git.kernel.org/stable/c/868d32ac72cba21c5c6d8a66a814b7c25a3a5c01
European references
- ENISA EUVD · EUVD-2026-71641
- GCVE · GCVE-0-2026-80891
CERT-FR advisories
- CERTFR-2026-AVI-1232 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48 ; affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < f00ef8efd41440129ccd88f4a1ebebf8d61d297f ; affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 15df7700dd99f8a37f5c6ed2dcf1e33009cdba47 ; affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < b878ba7e28144c9a857bc847d31f3c45413450ac ; affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528 ; affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 868d32ac72cba21c5c6d8a66a814b7c25a3a5c01 |
| Linux · Linux | affected 6.0 ; unaffected 0 < 6.0 ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.151 ≤ 6.6.* ; unaffected 6.12.103 ≤ 6.12.* ; unaffected 6.18.44 ≤ 6.18.* |
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 |