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CVE-2024-56544

17
FAUCET Score

CVE-2024-56544 is a vulnerability in the Linux kernel's udmabuf module, affecting systems with specific memory configurations. It stems from an insufficient memory allocation mechanism, where kmalloc's size limitations can prevent the creation of large udmabuf instances, leading to a denial of service. Rated as Medium severity (CVSS 5.5), this local vulnerability requires low privileges and complexity to trigger, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.20, < 6.11.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.12, < 6.12.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
11.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 54th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-570.12.1.el9_6
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (2)

redhatCVE-2024-56544Moderate

kernel: udmabuf: change folios array from kmalloc to kvmalloc

Dec 27, 2024
microsoft2024-Dec/CVE-2024-56544

udmabuf: change folios array from kmalloc to kvmalloc

Dec 10, 2024

References

git.kernel.org / stable/c/1c0844c6184e658064e14c4335885785ad3bf84b
Patch
git.kernel.org / stable/c/2acc6192aa8570661ed37868c02c03002b1dc290
Patch
git.kernel.org / stable/c/85bb72397cb63649fe493c96e27e1d0e4ed2ff63
Patch