What is CVE-2024-38543?

CVE-2024-38543 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 5.8 onward and patched in 6.1.93, 6.6.33, 6.8.12 and others. CVE-2024-38543 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-38543?

CVE-2024-38543 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-2024-38543?

Yes, CVE-2024-38543 has been patched. Fixed versions include 6.1.93, 6.6.33, 6.8.12 and others. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-38543 actively exploited?

CVE-2024-38543 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-2024-38543

Medium

In the Linux kernel, the following vulnerability has been resolved: lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen. Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations.

Package Linux Kernel

Published 2024-06-19

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-2024-38543 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 5.8 and later are affected. Fixed in 6.1.93, 6.6.33, 6.8.12, 6.9.3, 6.10 and their respective stable series.

Affected from

≥ 5.8

Fixed in

✓ 6.1.93 6.1.x ✓ 6.6.33 6.6.x ✓ 6.8.12 6.8.x ✓ 6.9.3 6.9.x ✓ 6.10

References

5 total

Kernel Git
https://git.kernel.org/stable/c/1a21fdeea502658e315bd939409b755974f4fb64

Patch
Kernel Git
https://git.kernel.org/stable/c/3b20d18f475bd17309db640dbe7d7c7ebb5bc2bc

Patch
Kernel Git
https://git.kernel.org/stable/c/65e528a69cb3ed4a286c45b4afba57461c8b5b33

Patch
Kernel Git
https://git.kernel.org/stable/c/c2af060d1c18beaec56351cf9c9bcbbc5af341a3

Patch
Kernel Git
https://git.kernel.org/stable/c/ce47e8ead9a72834cc68431d53f8092ce69bebb7

Patch

Details

CVE ID CVE-2024-38543

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-06-19

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-38543?

CVE-2024-38543 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 5.8 onward and has been patched in 6.1.93, 6.6.33, 6.8.12 and others. CVE-2024-38543 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-38543?

CVE-2024-38543 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-2024-38543?

Yes. CVE-2024-38543 has been patched. Fixed versions include 6.1.93, 6.6.33, 6.8.12 and others. If you are running Linux kernel 5.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-38543 actively exploited?

No. CVE-2024-38543 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.