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Medium severity5.5NVD Advisory· Published Dec 22, 2025· Updated Jun 17, 2026

CVE-2025-68333

CVE-2025-68333

Description

In the Linux kernel, the following vulnerability has been resolved:

sched_ext: Fix possible deadlock in the deferred_irq_workfn()

For PREEMPT_RT=y kernels, the deferred_irq_workfn() is executed in the per-cpu irq_work/* task context and not disable-irq, if the rq returned by container_of() is current CPU's rq, the following scenarios may occur:

lock(&rq->__lock);

lock(&rq->__lock);

This commit use IRQ_WORK_INIT_HARD() to replace init_irq_work() to initialize rq->scx.deferred_irq_work, make the deferred_irq_workfn() is always invoked in hard-irq context.

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Affected products

10
  • Linux/Kernel9 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.12,<6.12.68
    • cpe:2.3:o:linux:linux_kernel:6.18:rc1:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.18:rc2:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.18:rc3:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.18:rc4:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.18:rc5:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:6.18:rc6:*:*:*:*:*:*
    • (no CPE)range: 6.12
    • (no CPE)
  • osv-coords
    pkg:linux/kernel
    Range: >= 6.12.0, < 6.12.68

Patches

Vulnerability mechanics

References

3

News mentions

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