In the Linux kernel, the following vulnerability has been resolved: irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT On PREEMPT_RT, non-HARD irq_work runs in per-CPU kthreads via run_irq_workd(), so irq_work_sync() uses rcuwait() to wait for BUSY==0. After irq_work_single() clears BUSY via atomic_cmpxchg(), it still dereferences @work for irq_work_is_hard() and rcuwait_wake_up(). An irq_work_sync() caller on another CPU that enters after BUSY is cleared can observe BUSY==0 immediately, return, and free the work before those accesses complete — causing a use-after-free. Fix th...
In the Linux kernel, the following vulnerability has been resolved: irq_work: Fix use-after-free in irq_work_single() on PREEMPT_RT On PREEMPT_RT, non-HARD irq_work runs in per-CPU kthreads via run_irq_workd(), so irq_work_sync() uses rcuwait() to wait for BUSY==0. After irq_work_single() clears BUSY via atomic_cmpxchg(), it still dereferences @work for irq_work_is_hard() and rcuwait_wake_up(). An irq_work_sync() caller on another CPU that enters after BUSY is cleared can observe BUSY==0 immediately, return, and free the work before those accesses complete — causing a use-after-free. Fix th...
영향 제품·버전
제품 Linux
영향 버전 Linux >= 810979682ccc98dbd83f341c18a2e556c30a7164 < 2dc79362302922cb18f35e262712b5e58de65442, >= 810979682ccc98dbd83f341c18a2e556c30a7164 < eef4f71b46a9929ac33e968538c9dd5d96a02460, >= 810979682ccc98dbd83f341c18a2e556c30a7164 < 684a78183c54c23e70d1cba320f7fc184604210b, >= 810979682ccc98dbd83f341c18a2e556c30a7164 < 18c0456ea2615b1a743a6db739c74411c3b42bc6, >= 810979682ccc98dbd83f341c18a2e556c30a7164 < 81b582784518196eff1050212a046bc29d3a05dd, >= 810979682ccc98dbd83f341c18a2e556c30a7164 < 91840be8f710370607f949a627e070896faeddb8, >= 5.16