CVE-2025-40319
In the Linux kernel, the following vulnerability has been resolved: bpf: Sync pending IRQ work before freeing ring buffer Fix a race where irq_work can be queued in bpf_ringbuf_commit() but the ring buffer is freed before the work executes. In the syzbot reproducer, a BPF program attached to sched_switch triggers bpf_ringbuf_commit(), queuing an irq_work. If the ring buffer is freed before this work executes, the irq_work thread may accesses freed memory. Calling `irq_work_sync(&rb->work)` ensures that all pending irq_work complete before freeing the buffer.
Affected versions
Linux kernel versions
5.8
and later are affected. Fixed in
5.10.247,
5.15.197,
6.1.159,
6.6.117,
6.12.58,
6.17.8,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40319 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/10ca3b2eec384628bc9f5d8190aed9427ad2dde6
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PatchKernel patch commithttps://git.kernel.org/stable/c/430e15544f11f8de26b2b5109c7152f71b78295e
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PatchKernel patch commithttps://git.kernel.org/stable/c/47626748a2a00068dbbd5836d19076637b4e235b
Frequently asked questions
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What is CVE-2025-40319?
CVE-2025-40319 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.8 onward and has been patched in 5.10.247, 5.15.197, 6.1.159 and others. CVE-2025-40319 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-40319?
Yes — CVE-2025-40319 has been patched. Fixed versions include 5.10.247, 5.15.197, 6.1.159 and others. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40319 actively exploited?
No — CVE-2025-40319 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.