What is CVE-2022-49694?

CVE-2022-49694 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.16 onward and patched in 5.18.8 and 5.19. CVE-2022-49694 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-49694?

CVE-2022-49694 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2022-49694?

Yes, CVE-2022-49694 has been patched. Fixed versions include 5.18.8 and 5.19. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-49694 actively exploited?

CVE-2022-49694 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2022-49694

High

In the Linux kernel, the following vulnerability has been resolved: block: disable the elevator int del_gendisk The elevator is only used for file system requests, which are stopped in del_gendisk. Move disabling the elevator and freeing the scheduler tags to the end of del_gendisk instead of doing that work in disk_release and blk_cleanup_queue to avoid a use after free on q->tag_set from disk_release as the tag_set might not be alive at that point. Move the blk_qos_exit call as well, as it just depends on the elevator exit and would be the only reason to keep the not exactly cheap queue freeze in disk_release.

Package Linux Kernel

Published 2025-02-26

Last modified 2025-03-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2022-49694 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.16 and later are affected. Fixed in 5.18.8, 5.19 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 5.18.8 5.18.x ✓ 5.19

References

The following references provide additional information about CVE-2022-49694 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518
Patch
Kernel patch commit
https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6
Patch

Details

CVE ID CVE-2022-49694

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-02-26

Modified 2025-03-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-49694?

CVE-2022-49694 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.16 onward and has been patched in 5.18.8 and 5.19. CVE-2022-49694 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-49694?

CVE-2022-49694 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2022-49694?

Yes — CVE-2022-49694 has been patched. Fixed versions include 5.18.8 and 5.19. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-49694 actively exploited?

No — CVE-2022-49694 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →