CVE-2026-90250

CVE CVE-2026-90250EUVD EUVD-2026-81843Published 2026-09-17T16:07:51.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix storage null-ptr-deref after replacing prog Syzkaller reported a storage null-ptr-deref issue after replacing prog. This occurs in the following scenario: 1. prog A, an empty prog, is attached to a cgrp. 2. prog B uses BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE and calls the bpf_get_local_storage helper. 3. link_update is called to replace prog A with prog B. The reason is that __cgroup_bpf_replace fails to alloc and assign the required cgrp storage for the incoming replacement prog. Consequently, the new prog inherits an uninit storage, leading to null-ptr-deref panic when kick the new prog. Fix this by rejecting a link update if new_prog's cgroup storage is incompatible with link->prog.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <a033c950f6731be88a7da98604ed78f302f15b80; patch: 7.3-rc1; patch: 6.18.52; 5.7; patch: 6.12.110; patch: 0; patch: 7.2.6; 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94; 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <1ab3da12061d7ccb099f7e925fa2d865967a316a; 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab <12feca126831556dc7fabe5a3ba28fbd328768b6

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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