CVE-2026-80684 PUBLISHED

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

Assigner: Linux
Reserved: 26.08.2026 Published: 28.08.2026 Updated: 28.08.2026

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

The airq_iv_create() can return NULL on failure, but the return value was never checked. If it fails, zdev->aibv will be NULL and fail when dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the previously allocated AISB bit and zdev->aisb on failure.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to 96099486b63985801c9c6ef22505e9aa635b2d20 (excl.)
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to 0a95abe964400771ad82b027d7b84a0d183cd0db (excl.)
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to df947d85e164a50a29d43a96e814f69ab1d0f7ed (excl.)
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to e137d082325bbcae780087b57501d38585e625d9 (excl.)
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to d1a103dc9016c25e7423ce5841a5cc2df76d59f3 (excl.)
  • affected from 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to 8bf09b9b7d3232806df95f409581f8a9fd99a3fa (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.0 is affected
  • unaffected from 0 to 6.0 (excl.)
  • unaffected from 6.1.183 to 6.1.* (incl.)
  • unaffected from 6.6.151 to 6.6.* (incl.)
  • unaffected from 6.12.103 to 6.12.* (incl.)
  • unaffected from 6.18.44 to 6.18.* (incl.)
  • unaffected from 7.1.8 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References