What is CVE-2024-36891?

CVE-2024-36891 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.1 onward and patched in 6.1.94, 6.6.31, 6.8.10 and others. CVE-2024-36891 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-36891?

CVE-2024-36891 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-2024-36891?

Yes, CVE-2024-36891 has been patched. Fixed versions include 6.1.94, 6.6.31, 6.8.10 and others. If you are running Linux kernel 6.1 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-36891 actively exploited?

CVE-2024-36891 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2024-36891

Medium

In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix mas_empty_area_rev() null pointer dereference Currently the code calls mas_start() followed by mas_data_end() if the maple state is MA_START, but mas_start() may return with the maple state node == NULL. This will lead to a null pointer dereference when checking information in the NULL node, which is done in mas_data_end(). Avoid setting the offset if there is no node by waiting until after the maple state is checked for an empty or single entry state. A user could trigger the events to cause a kernel oops by unmapping all vmas to produce an empty maple tree, then mapping a vma that would cause the scenario described above.

Package Linux Kernel

Published 2024-05-30

Last modified 2024-11-21

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-476

CVE-2024-36891 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.1 and later are affected. Fixed in 6.1.94, 6.6.31, 6.8.10, 6.9 and their respective stable series.

Affected from

≥ 6.1

Fixed in

✓ 6.1.94 6.1.x ✓ 6.6.31 6.6.x ✓ 6.8.10 6.8.x ✓ 6.9

References

4 total

Kernel Git
https://git.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00

Patch
Kernel Git
https://git.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cf

Patch
Kernel Git
https://git.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486cc

Patch
Kernel Git
https://git.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415

Details

CVE ID CVE-2024-36891

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-30

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-36891?

CVE-2024-36891 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.1 onward and has been patched in 6.1.94, 6.6.31, 6.8.10 and others. CVE-2024-36891 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-36891?

CVE-2024-36891 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-2024-36891?

Yes. CVE-2024-36891 has been patched. Fixed versions include 6.1.94, 6.6.31, 6.8.10 and others. If you are running Linux kernel 6.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-36891 actively exploited?

No. CVE-2024-36891 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.