CVE-2026-90313None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed A potential invalid storage access issue can occur after replacing a cgroup bpf prog. This oc…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
In the Linux kernel, the following vulnerability has been resolved:
bpf, cgroup: Fix invalid storage access after __cgroup_bpf_attach failed
A potential invalid storage access issue can occur after replacing a cgroup bpf prog.
This occurs in the following scenario:
The reason is that __cgroup_bpf_attach overwrites pl->storage with the new storage prior to attachment completion. When attachment fails midway, the cleanup path calls bpf_cgroup_storages_free(new_storage) to free the newly allocated storage, but fails to restore pl->storage back to old_storage.
Consequently, the still-active prog1 holds invalid or dangling storage pointers, leading to an invalid memory access when prog1 executes and calls bpf_get_local_storage. Additionally, original pl->flags and cgrp->bpf.flags[atype] are left unrestored.
Fix this by saving old_pl_flags, old_storage, and old_flags prior to the update, and properly restoring all of them in the cleanup path on error.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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