CVE-2022-49541 cifs: fix potential double free during failed mount

High 7.8 Published 26 Feb 2025 Updated 5 Aug 2026

A double free vulnerability in the Linux kernel CIFS module during failed mounts can cause a system crash, requiring a kernel patch.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2022-49541?

CVE-2022-49541 is a high-severity use after free vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

cifs: fix potential double free during failed mount

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=2088799

Weakness: CWE-415

Which versions are affected by CVE-2022-49541?

It affects 1 product.

Linux distribution packages (12)

`kpatch-patch-5_14_0-70_112_1` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-5.el9_0`
`kpatch-patch-5_14_0-70_112_1-debuginfo` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-5.el9_0`
`kpatch-patch-5_14_0-70_112_1-debugsource` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-5.el9_0`
`kpatch-patch-5_14_0-70_121_1` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-4.el9_0`
`kpatch-patch-5_14_0-70_121_1-debuginfo` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-4.el9_0`
`kpatch-patch-5_14_0-70_121_1-debugsource` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-4.el9_0`
`kpatch-patch-5_14_0-70_124_1` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-2.el9_0`
`kpatch-patch-5_14_0-70_124_1-debuginfo` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-2.el9_0`
`kpatch-patch-5_14_0-70_124_1-debugsource` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-2.el9_0`
`kpatch-patch-5_14_0-70_85_1` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-9.el9_0`
`kpatch-patch-5_14_0-70_85_1-debuginfo` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-9.el9_0`
`kpatch-patch-5_14_0-70_85_1-debugsource` Red Hat:rhel_e4s:9.0::baseos	All versions	`0:1-9.el9_0`

Products include Linux kernel.

How do I fix CVE-2022-49541?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-49541 being exploited?

There is no known exploitation of CVE-2022-49541 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2022-49541, GHSA-g5vv-jqc9-w8hm, RHSA-2025:3961, ROOT-OS-DEBIAN-11-CVE-2022-49541, UBUNTU-CVE-2022-49541.