CVE-2026-89959high

CVE-2026-89959: high-severity vulnerability in Linux

s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove

Published

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.2%
exploitation probability
0.2%top 93% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/02e72909453dee2f8a09f78819f9a9cb902dfbdchttps://git.kernel.org/stable/c/12871a4269f139221c9fde9ea3eb69c9228f59d4https://git.kernel.org/stable/c/2ff68bf414de167bc138e6e211ee1ad3ab3c5052https://git.kernel.org/stable/c/4bffadde7fc49b00493fb78c6376f958998d4b8chttps://git.kernel.org/stable/c/6b8a02e216f6b520cc029e43ddc83956605135d5https://git.kernel.org/stable/c/f7d66afc34bc6e833c8ebe56973afec35f473bc1