{"id":"CVE-2026-90250","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cgroup: Fix storage null-ptr-deref after replacing prog\n\nSyzkaller reported a storage null-ptr-deref issue after replacing prog.\nThis occurs in the following scena…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cgroup: Fix storage null-ptr-deref after replacing prog\n\nSyzkaller reported a storage null-ptr-deref issue after replacing prog.\nThis occurs in the following scena…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < a033c950f6731be88a7da98604ed78f302f15b80","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 1ab3da12061d7ccb099f7e925fa2d865967a316a","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 12feca126831556dc7fabe5a3ba28fbd328768b6","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94","Linux 5.7"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:21.237","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90250","references":[{"url":"https://git.kernel.org/stable/c/12feca126831556dc7fabe5a3ba28fbd328768b6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1ab3da12061d7ccb099f7e925fa2d865967a316a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a033c950f6731be88a7da98604ed78f302f15b80","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.844Z","epss":0.002,"epssPercentile":0.10121,"slug":"CVE-2026-90250","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cgroup: Fix storage null-ptr-deref after replacing prog\n\nSyzkaller reported a storage null-ptr-deref issue after replacing prog.\nThis occurs in the following scenario:\n1. prog A, an empty prog, is attached to a cgrp.\n2. prog B uses BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE and calls the\n   bpf_get_local_storage helper.\n3. link_update is called to replace prog A with prog B.\n\nThe reason is that __cgroup_bpf_replace fails to alloc and assign the\nrequired cgrp storage for the incoming replacement prog. Consequently,\nthe new prog inherits an uninit storage, leading to null-ptr-deref panic\nwhen kick the new prog.\n\nFix this by rejecting a link update if new_prog's cgroup storage is\nincompatible with link->prog.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}