CVE-2025-68814

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

io_uring: fix filename leak in __io_openat_prep()

__io_openat_prep() allocates a struct filename using getname(). However,

for the condition of the file being installed in the fixed file table as

well as having O_CLOEXEC flag set, the function returns early. At that

point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this,

the memory for the newly allocated struct filename is not cleaned up,

causing a memory leak.

Fix this by setting the REQ_F_NEED_CLEANUP for the request just after the

successful getname() call, so that when the request is torn down, the

filename will be cleaned up, along with other resources needing cleanup.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References