UNKNOWN NVD
CVE-2026-80891
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 p
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/15df7700dd99f8a37f5c6ed2dcf1e33009cdba47
- https://git.kernel.org/stable/c/3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48
- https://git.kernel.org/stable/c/868d32ac72cba21c5c6d8a66a814b7c25a3a5c01
- https://git.kernel.org/stable/c/b878ba7e28144c9a857bc847d31f3c45413450ac
- https://git.kernel.org/stable/c/f00ef8efd41440129ccd88f4a1ebebf8d61d297f
This unknown severity vulnerability was published on 2026-09-04 via NVD.
vulnfeed aggregates 10236 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.