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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-80891

KVM: s390: pci: Validate AIBV and AISB before pinning guest pages

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Status
Published
Published
Updated
Assigning organization
Linux

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < f00ef8efd41440129ccd88f4a1ebebf8d61d297faffected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 15df7700dd99f8a37f5c6ed2dcf1e33009cdba47affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < b878ba7e28144c9a857bc847d31f3c45413450acaffected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 868d32ac72cba21c5c6d8a66a814b7c25a3a5c01affected

Linux Linux

Default version status: affected

  • 6.0affected
  • 0 to < 6.0unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.151 to ≤ 6.6.*unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References