What is CVE-2024-43856?

CVE-2024-43856 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2024-43856 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-43856?

CVE-2024-43856 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-2024-43856?

No patch is currently available for CVE-2024-43856. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2024-43856 actively exploited?

CVE-2024-43856 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-43856

Medium

In the Linux kernel, the following vulnerability has been resolved: dma: fix call order in dmam_free_coherent dmam_free_coherent() frees a DMA allocation, which makes the freed vaddr available for reuse, then calls devres_destroy() to remove and free the data structure used to track the DMA allocation. Between the two calls, it is possible for a concurrent task to make an allocation with the same vaddr and add it to the devres list. If this happens, there will be two entries in the devres list with the same vaddr and devres_destroy() can free the wrong entry, triggering the WARN_ON() in dmam_match. Fix by destroying the devres entry before freeing the DMA allocation. kokonut //net/encryption http://sponge2/b9145fe6-0f72-4325-ac2f-a84d81075b03

Package Linux Kernel

Published 2024-08-17

Last modified 2026-05-12

CVSS version 3.1

Patch available

Awaiting data

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-770

CVE-2024-43856 is classified as CWE-770

See CWE-770 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2024-43856 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
Debian Security
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Kernel patch commit
https://git.kernel.org/stable/c/1fe97f68fce1ba24bf823bfb0eb0956003473130
Patch
Kernel patch commit
https://git.kernel.org/stable/c/22094f5f52e7bc16c5bf9613365049383650b02e
Patch
Kernel patch commit
https://git.kernel.org/stable/c/257193083e8f43907e99ea633820fc2b3bcd24c7
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2024-43856

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-08-17

Modified 2026-05-12

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2024-43856?

CVE-2024-43856 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2024-43856 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-43856?

CVE-2024-43856 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-2024-43856?

No patch is currently available for CVE-2024-43856. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2024-43856 actively exploited?

No — CVE-2024-43856 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.