{"id":"CVE-2026-89959","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove\n\nThe vfio_ap_config_remove function uses the bitmap_andnot function to clear\nbits from the matrix_md…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove\n\nThe vfio_ap_config_remove function uses the bitmap_andnot function to clear\nbits from the matrix_md…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < 12871a4269f139221c9fde9ea3eb69c9228f59d4","Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < 02e72909453dee2f8a09f78819f9a9cb902dfbdc","Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < 4bffadde7fc49b00493fb78c6376f958998d4b8c","Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < f7d66afc34bc6e833c8ebe56973afec35f473bc1","Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < 2ff68bf414de167bc138e6e211ee1ad3ab3c5052","Linux >= eeb386aeb5b7c8d2dae6a3ba49255d8a97803182 < 6b8a02e216f6b520cc029e43ddc83956605135d5","Linux 6.0"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:20.433","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89959","references":[{"url":"https://git.kernel.org/stable/c/02e72909453dee2f8a09f78819f9a9cb902dfbdc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/12871a4269f139221c9fde9ea3eb69c9228f59d4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2ff68bf414de167bc138e6e211ee1ad3ab3c5052","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4bffadde7fc49b00493fb78c6376f958998d4b8c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6b8a02e216f6b520cc029e43ddc83956605135d5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f7d66afc34bc6e833c8ebe56973afec35f473bc1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.959Z","epss":0.00164,"epssPercentile":0.06051,"slug":"CVE-2026-89959","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove\n\nThe vfio_ap_config_remove function uses the bitmap_andnot function to clear\nbits from the matrix_mdev->matrix.adm bitmap (specifies the control domains\nassigned to the mdev). This prevents the explicitly unplugged control\ndomains from being removed the KVM guest. The bitmap_and function is used\ninstead.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205087,"id":"CVE-2026-89959","ts":1789570705174,"field":"cvss","old":null,"new":"8.8"},{"seq":205086,"id":"CVE-2026-89959","ts":1789570705174,"field":"severity","old":"none","new":"high"}]}