Threats Tagged 'ghsa-7564-v46w-3pmr'
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Threats Tagged 'ghsa-7564-v46w-3pmr'
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A use-after-free vulnerability in the Linux kernel's fprobe subsystem has been resolved. The issue arises because unregister_fprobe() and unregister_fprobe_async() rely on standard RCU grace periods that do not track execution when RCU is not watching, such as in idle or nohz_full states. This can lead to use-after-free if an fprobe handler runs during these states after unregistration. The fix involves using guard(rcu_sched_notrace) and checking rcu_is_watching() to ensure handlers exit early when RCU is not watching, and reducing lockdep overhead by replacing rcu_read_lock() with rcu_read_lock_sched_notrace() where appropriate. Join the discussion | GCVE Database | 10/18/2026, 18:32:06 UTC Added: 10/18/2026, 19:40:25 UTC |
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