What is CVE-2022-49809?

CVE-2022-49809 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 3.0.72 onward and patched in 4.9.334, 4.14.300, 4.19.267 and others. CVE-2022-49809 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-49809?

CVE-2022-49809 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2022-49809?

Yes, CVE-2022-49809 has been patched. Fixed versions include 4.9.334, 4.14.300, 4.19.267 and others. If you are running Linux kernel 3.0.72 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-49809 actively exploited?

CVE-2022-49809 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2022-49809

Medium

In the Linux kernel, the following vulnerability has been resolved: net/x25: Fix skb leak in x25_lapb_receive_frame() x25_lapb_receive_frame() using skb_copy() to get a private copy of skb, the new skb should be freed in the undersized/fragmented skb error handling path. Otherwise there is a memory leak.

Package Linux Kernel

Published 2025-05-01

Last modified 2025-11-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-401

CVE-2022-49809 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.0.72, 3.1 and later are affected. Fixed in 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.156, 5.15.80, 6.0.10, 6.1 and their respective stable series.

Affected from

≥ 3.0.72 ≥ 3.1

Fixed in

✓ 4.9.334 4.9.x ✓ 4.14.300 4.14.x ✓ 4.19.267 4.19.x ✓ 5.4.225 5.4.x ✓ 5.10.156 5.10.x ✓ 5.15.80 5.15.x ✓ 6.0.10 6.0.x ✓ 6.1

References

The following references provide additional information about CVE-2022-49809 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/0ef17d966445358a55c5f4ccf2c73cca3e39192b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2929cceb2fcf0ded7182562e4888afafece82cce
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2d675be16a461310d738d93f9f1a00da62055c5a
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2022-49809

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-01

Modified 2025-11-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-49809?

CVE-2022-49809 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 3.0.72 onward and has been patched in 4.9.334, 4.14.300, 4.19.267 and others. CVE-2022-49809 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-49809?

CVE-2022-49809 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2022-49809?

Yes — CVE-2022-49809 has been patched. Fixed versions include 4.9.334, 4.14.300, 4.19.267 and others. If you are running Linux kernel 3.0.72 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-49809 actively exploited?

No — CVE-2022-49809 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. View CWE-401 on MITRE CWE →