What’s Vulnerable › Vulnerabilities

CVE-2025-40267: io_uring/rw: ensure allocated iovec gets cleared for early failure

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-06 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: ensure allocated iovec gets cleared for early failure A previous commit reused the recyling infrastructure for early cleanup, but this is not enough for the case where our internal caches have overflowed. If this happens, then the allocated iovec can get leaked if the request is also aborted early. Reinstate the previous forced free of the iovec for that situation.

Affected products

• Linux kernel: 6.14 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/094c6467fe05e0de618c5a7fcff4d3ee20aeaef8
• https://git.kernel.org/stable/c/d3c9c213c0b86ac5dd8fe2c53c24db20f1f510bc

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