CVE-2023-52914: io_uring/poll: add hash if ready poll request can't complete inline

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: none known
Published: 2024-08-21 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/poll: add hash if ready poll request can't complete inline If we don't, then we may lose access to it completely, leading to a request leak. This will eventually stall the ring exit process as well.

Affected products

Linux kernel: from 6.0 before 6.1.7; 6.2-rc1, 6.2-rc2, 6.2-rc3 — fixed in 6.1.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.7. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/4ad6c063541665c407d17e1faf2fe4f04e947dcc
https://git.kernel.org/stable/c/febb985c06cb6f5fac63598c0bffd4fd823d110d

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