CVE-2026-80891

CVE CVE-2026-80891EUVD EUVD-2026-71641Published 2026-09-04T17:11:07.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.6.151; patch: 6.12.103; patch: 7.2; patch: 0; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <b878ba7e28144c9a857bc847d31f3c45413450ac; patch: 7.1.8; patch: 6.1.183; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <868d32ac72cba21c5c6d8a66a814b7c25a3a5c01; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528; patch: 6.18.44; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <15df7700dd99f8a37f5c6ed2dcf1e33009cdba47; 6.0; 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc <f00ef8efd41440129ccd88f4a1ebebf8d61d297f

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.