What is CVE-2024-26831?

CVE-2024-26831 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 6.5.6 onward and patched in 6.6.18, 6.7.6 and 6.8. CVE-2024-26831 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26831?

CVE-2024-26831 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-2024-26831?

Yes, CVE-2024-26831 has been patched. Fixed versions include 6.6.18, 6.7.6 and 6.8. If you are running Linux kernel 6.5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-26831 actively exploited?

CVE-2024-26831 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-2024-26831

Medium

In the Linux kernel, the following vulnerability has been resolved: net/handshake: Fix handshake_req_destroy_test1 Recently, handshake_req_destroy_test1 started failing: Expected handshake_req_destroy_test == req, but handshake_req_destroy_test == 0000000000000000 req == 0000000060f99b40 not ok 11 req_destroy works This is because "sock_release(sock)" was replaced with "fput(filp)" to address a memory leak. Note that sock_release() is synchronous but fput() usually delays the final close and clean-up. The delay is not consequential in the other cases that were changed but handshake_req_destroy_test1 is testing that handshake_req_cancel() followed by closing the file actually does call the ->hp_destroy method. Thus the PTR_EQ test at the end has to be sure that the final close is complete before it checks the pointer. We cannot use a completion here because if ->hp_destroy is never called (ie, there is an API bug) then the test will hang. Reported by: Guenter Roeck <[email protected]>

Package Linux Kernel

Published 2024-04-17

Last modified 2025-04-02

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-2024-26831 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 6.5.6, 6.6 and later are affected. Fixed in 6.6.18, 6.7.6, 6.8 and their respective stable series.

Affected from

≥ 6.5.6 ≥ 6.6

Fixed in

✓ 6.6.18 6.6.x ✓ 6.7.6 6.7.x ✓ 6.8

References

3 total

Kernel Git
https://git.kernel.org/stable/c/4e1d71cabb19ec2586827adfc60d68689c68c194

Patch
Kernel Git
https://git.kernel.org/stable/c/7f97805b8df6e33850e225e6bd3ebd9e246920af

Patch
Kernel Git
https://git.kernel.org/stable/c/d74226e03df1bf19848f18344401f254345af912

Patch

Details

CVE ID CVE-2024-26831

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-17

Modified 2025-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26831?

CVE-2024-26831 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 6.5.6 onward and has been patched in 6.6.18, 6.7.6 and 6.8. CVE-2024-26831 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26831?

CVE-2024-26831 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-2024-26831?

Yes. CVE-2024-26831 has been patched. Fixed versions include 6.6.18, 6.7.6 and 6.8. If you are running Linux kernel 6.5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-26831 actively exploited?

No. CVE-2024-26831 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.