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CVE-2025-40319

HIGHCVSS 7.8/10EPSS 0.17%

Last modified

CVE-2025-40319 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.17%

6.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 457f44363a8894135c85b7a9afd2bd8196db24ab, < 47626748a2a00068dbbd5836d19076637b4e235b; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < de2ce6b14bc3e565708a39bdba3ef9162aeffc72; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < e1828c7a8d8135e21ff6adaaa9458c32aae13b11; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < 6451141103547f4efd774e912418a3b4318046c6; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < 10ca3b2eec384628bc9f5d8190aed9427ad2dde6; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < 430e15544f11f8de26b2b5109c7152f71b78295e; >= 457f44363a8894135c85b7a9afd2bd8196db24ab, < 4e9077638301816a7d73fa1e1b4c1db4a7e3b59c
LinuxLinux5.8

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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.
How severe is CVE-2025-40319?
CVE-2025-40319 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40319?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST