bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem()
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem()
bpf_map_lookup_percpu_elem() helper is also available for sleepable bpf
program. When BPF JIT is disabled or under 32-bit host,
bpf_map_lookup_percpu_elem() will not be inlined. Using it in a
sleepable bpf program will trigger the warning in
bpf_map_lookup_percpu_elem(), because the bpf program only holds
rcu_read_lock_trace lock. Therefore, add the missed check.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/2d834477bbc1e8b8a59ff8b0c081529d6bed7b22https://git.kernel.org/stable/c/2f8c69a72e8ad87b36b8052f789da3cc2b2e186chttps://git.kernel.org/stable/c/7bf4461f1c97207fda757014690d55a447ce859fhttps://git.kernel.org/stable/c/b522d4d334f206284b1a44b0b0b2f99fd443b39bhttps://git.kernel.org/stable/c/d4965578267e2e81f67c86e2608481e77e9c8569https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html