CVE-2025-37884: Linux kernel · bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 22:03 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 9 May 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.
What to do
AI-suggested
A fix is available that delegates trace_set_clr_event() to a workqueue to avoid the deadlock. Users should apply the official Linux kernel updates that include this fix. No other mitigation or workaround is indicated.
Description
A deadlock vulnerability in the Linux kernel's BPF subsystem was fixed. The issue involved a deadlock between rcu_tasks_trace and event_mutex due to lock dependency cycles during event freeing and BPF program test run operations. The fix delegates trace_set_clr_event() to a workqueue to avoid this deadlock.