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Back to active CVEs
High · CVSS 8.8CVE-2026-89959

s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_removeCVE-2026-89959

Answer in brief

CVE-2026-89959 records a High severity (CVSS 8.8) vulnerability in s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Oct 19, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <12871a4269f139221c9fde9ea3eb69c9228f59d4 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <02e72909453dee2f8a09f78819f9a9cb902dfbdc || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <4bffadde7fc49b00493fb78c6376f958998d4b8c || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <f7d66afc34bc6e833c8ebe56973afec35f473bc1 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <2ff68bf414de167bc138e6e211ee1ad3ab3c5052 || >=eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 <6b8a02e216f6b520cc029e43ddc83956605135d512871a4269f139221c9fde9ea3eb69c9228f59d4, 02e72909453dee2f8a09f78819f9a9cb902dfbdc, 4bffadde7fc49b00493fb78c6376f958998d4b8c, f7d66afc34bc6e833c8ebe56973afec35f473bc1, 2ff68bf414de167bc138e6e211ee1ad3ab3c5052, 6b8a02e216f6b520cc029e43ddc83956605135d5
Linux/Linuxgeneric6.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 12871a4269f139221c9fde9ea3eb69c9228f59d4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 16, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove The vfio_ap_config_remove function uses the bitmap_andnot function to clear bits from the matrix_mdev->matrix.adm bitmap (specifies the control domains assigned to the mdev). This prevents the explicitly unplugged control domains from being removed the KVM guest. The bitmap_and function is used instead.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 31, 2026
References
6 linked sources
Open source record