CVE-2026-89959
8.8 HIGHPublished 2026-09-16 · Updated 2026-09-16
AI risk analysis
- Summary
- This vulnerability allows control domains to be improperly removed, potentially leaving KVM guests exposed. It matters because it could lead to unauthorized access or control of virtual machines.
- Exploitability
- Exploitation requires kernel-level access and specific conditions, making it moderately difficult. Precondition is the presence of a vulnerable vfio_ap configuration.
- Blast radius
- If exploited, it could result in unauthorized access or control of KVM guests running on the affected system.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to the fixed version 5.19.10 or later.
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD 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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
All references
- https://git.kernel.org/stable/c/02e72909453dee2f8a09f78819f9a9cb902dfbdc
- https://git.kernel.org/stable/c/12871a4269f139221c9fde9ea3eb69c9228f59d4
- https://git.kernel.org/stable/c/2ff68bf414de167bc138e6e211ee1ad3ab3c5052
- https://git.kernel.org/stable/c/4bffadde7fc49b00493fb78c6376f958998d4b8c
- https://git.kernel.org/stable/c/6b8a02e216f6b520cc029e43ddc83956605135d5
- https://git.kernel.org/stable/c/f7d66afc34bc6e833c8ebe56973afec35f473bc1
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
Related CVEs
- HIGHCVE-2026-64562
- HIGHCVE-2026-89777
- CRITICALCVE-2026-89914
- CRITICALCVE-2026-89915
- HIGHCVE-2026-89957
- HIGHCVE-2026-89960
- CRITICALCVE-2026-100075
- HIGHCVE-2026-13087
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