CVSS
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
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Време до експлоатация
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: slab: fix kmalloc_nolock() context check for PREEMPT_RT On PREEMPT_RT kernels, local_lock becomes a sleeping lock. The current check in kmalloc_nolock() only verifies we're not in NMI or hard IRQ context, but misses the case where preemption is disabled. When a BPF program runs from a tracepoint with preemption disabled (preempt_count > 0), kmalloc_nolock() proceeds to call local_lock_irqsave() which attempts to acquire a sleeping lock, triggering: BUG: sleeping function called from invalid context in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6128 preempt_count: 2, expected: 0 Fix this by checking !preemptible() on PREEMPT_RT, which directly expresses the constraint that we cannot take a sleeping lock when preemption is disabled. This encompasses the previous checks for NMI and hard IRQ contexts while also catching cases where preemption is disabled.
Засегнати продукти
- Linux Linux: af92793e52c3a99b828ed4bdd277fd3e11c18d08 преди f60ba4a97ae3f94e4818722ed2e4d260bbb17b44; af92793e52c3a99b828ed4bdd277fd3e11c18d08 преди 99a3e3a1cfc93b8fe318c0a3a5cfb01f1d4ad53c
- Linux Linux: 6.18; преди 6.18; 6.18.8 до 6.18.*; от 6.19 нататък
История
- 14 февруари 2026 Публикувано