CVE-2026-80891
Last modified
CVE-2026-80891 is a vulnerability of currently unknown severity. 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.
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.
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < f00ef8efd41440129ccd88f4a1ebebf8d61d297f; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 15df7700dd99f8a37f5c6ed2dcf1e33009cdba47; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < b878ba7e28144c9a857bc847d31f3c45413450ac; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 868d32ac72cba21c5c6d8a66a814b7c25a3a5c01 |
| Linux | Linux | 6.0 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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