VulnerabilityPublished 4 Jul 2025Updated 5 Nov 2026

CVE-2025-38202: Linux kernel · bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d4965578267e2e81f67c86e2608481e77e9c8569 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in d4965578267e2e81f67c86e2608481e77e9c8569, b522d4d334f206284b1a44b0b0b2f99fd443b39b, 7bf4461f1c97207fda757014690d55a447ce859f +2

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 07343110b293456d30393e89b86c4dee1ac051c8, < d4965578267e2e81f67c86e2608481e77e9c8569	Fixed in d4965578267e2e81f67c86e2608481e77e9c8569
LinuxLinux	Affected ≥ 07343110b293456d30393e89b86c4dee1ac051c8, < b522d4d334f206284b1a44b0b0b2f99fd443b39b	Fixed in b522d4d334f206284b1a44b0b0b2f99fd443b39b
LinuxLinux	Affected ≥ 07343110b293456d30393e89b86c4dee1ac051c8, < 7bf4461f1c97207fda757014690d55a447ce859f	Fixed in 7bf4461f1c97207fda757014690d55a447ce859f
LinuxLinux	Affected ≥ 07343110b293456d30393e89b86c4dee1ac051c8, < 2f8c69a72e8ad87b36b8052f789da3cc2b2e186c	Fixed in 2f8c69a72e8ad87b36b8052f789da3cc2b2e186c
LinuxLinux	Affected ≥ 07343110b293456d30393e89b86c4dee1ac051c8, < 2d834477bbc1e8b8a59ff8b0c081529d6bed7b22	Fixed in 2d834477bbc1e8b8a59ff8b0c081529d6bed7b22
LinuxLinux	Affected =5.19	Fixed in–

Description

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.

References

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