CVE-2025-38202
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/2d834477bbc1e8b8a59ff8b0c081529d6bed7b22 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/2d834477bbc1e8b8a59ff8b0c081529d6bed7b22Patch
- https://git.kernel.org/stable/c/2f8c69a72e8ad87b36b8052f789da3cc2b2e186cPatch
- https://git.kernel.org/stable/c/7bf4461f1c97207fda757014690d55a447ce859fPatch
- https://git.kernel.org/stable/c/b522d4d334f206284b1a44b0b0b2f99fd443b39bPatch
- https://git.kernel.org/stable/c/d4965578267e2e81f67c86e2608481e77e9c8569Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlAdvisory