CVE-2025-38002: io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo()

Severity: medium (CVSS 5.5 v3.1)
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: yes
Published: 2025-06-06 · updated 2026-07-30

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo() Not everything requires locking in there, which is why the 'has_lock' variable exists. But enough does that it's a bit unwieldy to manage. Wrap the whole thing in a ->uring_lock trylock, and just return with no output if we fail to grab it. The existing trylock() will already have greatly diminished utility/output for the failure case. This fixes an issue with reading the SQE fields, if the ring is being actively resized at the same time.

Affected products

Linux kernel: from 6.13 before 6.14.8; 6.15-rc1, 6.15-rc2, 6.15-rc3, 6.15-rc4, 6.15-rc5, 6.15-rc6 — fixed in 6.14.8

How to fix

Upgrade to a fixed version: Linux kernel 6.14.8. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-38002 or the next vulnerability affects your stack