CVE-2025-38202 affects the Linux kernel BPF helper bpf_map_lookup_percpu_elem(). The helper is available to sleepable BPF programs but lacks a check recognizing the rcu_read_lock_trace lock held by those programs. When BPF JIT is disabled or the host is 32-bit, the helper is not inlined, and calling it from a sleepable BPF program triggers a kernel warning despite the trace RCU lock being held. The fix adds the missing rcu_read_lock_trace_held() check.
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A Linux kernel BPF flaw involving a missing lock-state check in bpf_map_lookup_percpu_elem(). The issue affects sleepable BPF programs when the helper is not inlined, including when BPF JIT is disabled or on 32-bit hosts. The advisory assigns CVSS v3 severity 5.5, indicating a local, low-privilege vulnerability with high availability impact and no confidentiality or integrity impact. The prescribed fix is updating the affected Google kernel packages to version 18613.339.11 or later.
A missing RCU trace-lock check in the Linux kernel's BPF subsystem causes an incorrect warning when a sleepable BPF program invokes the non-inlined bpf_map_lookup_percpu_elem() helper. The advisory assigns a CVSS v3 score of 5.5, reflecting local access, low privileges, and high availability impact. Echo linux packages are fixed in version 6.1.147-1 or later.
Linux kernel BPF vulnerability related to missing rcu_read_lock_trace_held() checking in bpf_map_lookup_percpu_elem().
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Cross-references every affected SKU, including bundled OEM variants.
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