What is CVE-2022-50421?

CVE-2022-50421 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 5.18 onward and patched in 5.19.17, 6.0.3 and 6.1. CVE-2022-50421 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-50421?

CVE-2022-50421 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-2022-50421?

Yes, CVE-2022-50421 has been patched. Fixed versions include 5.19.17, 6.0.3 and 6.1. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-50421 actively exploited?

CVE-2022-50421 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-2022-50421

High

In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Avoid double destroy of default endpoint The rpmsg_dev_remove() in rpmsg_core is the place for releasing this default endpoint. So need to avoid destroying the default endpoint in rpmsg_chrdev_eptdev_destroy(), this should be the same as rpmsg_eptdev_release(). Otherwise there will be double destroy issue that ept->refcount report warning: refcount_t: underflow; use-after-free. Call trace: refcount_warn_saturate+0xf8/0x150 virtio_rpmsg_destroy_ept+0xd4/0xec rpmsg_dev_remove+0x60/0x70 The issue can be reproduced by stopping remoteproc before closing the /dev/rpmsgX.

Package Linux Kernel

Published 2025-10-01

Last modified 2026-01-14

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-2022-50421 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 5.18 and later are affected. Fixed in 5.19.17, 6.0.3, 6.1 and their respective stable series.

Affected from

≥ 5.18

Fixed in

✓ 5.19.17 5.19.x ✓ 6.0.3 6.0.x ✓ 6.1

References

The following references provide additional information about CVE-2022-50421 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/3f20ef7a845c2c8d7ec82ecffa20d95cab5ecfeb
Patch
Kernel patch commit
https://git.kernel.org/stable/c/467233a4ac29b215d492843d067a9f091e6bf0c5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ef828a39d6a7028836eaf37df3ad568c8c2dd6f9
Patch

Details

CVE ID CVE-2022-50421

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-10-01

Modified 2026-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-50421?

CVE-2022-50421 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 5.18 onward and has been patched in 5.19.17, 6.0.3 and 6.1. CVE-2022-50421 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-50421?

CVE-2022-50421 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-2022-50421?

Yes — CVE-2022-50421 has been patched. Fixed versions include 5.19.17, 6.0.3 and 6.1. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-50421 actively exploited?

No — CVE-2022-50421 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 →