CVE-2026-52933

A flaw was found in the Linux kernel's io_uring/poll component. A logic error exists in the io_poll_get_ownership() function due to an incorrect signed comparison. This flaw prevents the necessary slowpath from being triggered when the IO_POLL_CANCEL_FLAG is set, potentially leading to unexpected behavior or resource mismanagement within the kernel.

In the default Red Hat Enterprise Linux kernel, io_uring is disabled and cannot be used unless explicitly enabled by an administrator. It can be enabled by configuring the kernel.io_uring_disabled sysctl parameter to 0 or 1, or through another supported method for configuring sysctl parameters.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.