CVE-2022-49705: 9p: fix fid refcount leak in v9fs_vfs_atomic_open_dotl

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: 9p: fix fid refcount leak in v9fs_vfs_atomic_open_dotl We need to release directory fid if we fail halfway through open This fixes fid leaking with xfstests generic 531

Affected products

Linux kernel: from 5.11 before 5.15.51; from 5.16 before 5.18.8; 5.19-rc1, 5.19-rc2, 5.19-rc3 — fixed in 5.15.51, 5.18.8

How to fix

Upgrade to a fixed version: Linux kernel 5.15.51, 5.18.8. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/22832ac3eb5be3f7168816a76b64c1284e12eb3c
https://git.kernel.org/stable/c/8bc5412ba1a45edfd1e451874c483c26a097af2b
https://git.kernel.org/stable/c/beca774fc51a9ba8abbc869cf0c3d965ff17cd24

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