CVE-2024-56544

5.5 · MEDIUM

Published Dec 27, 2024 linux CWE-476 EPSS 0.21% (12th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-56544 is a medium-severity vulnerability affecting linux linux_kernel. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

udmabuf: change folios array from kmalloc to kvmalloc

When PAGE_SIZE 4096, MAX_PAGE_ORDER 10, 64bit machine,

page_alloc only support 4MB.

If above this, trigger this warn and return NULL.

udmabuf can change size limit, if change it to 3072(3GB), and then alloc

3GB udmabuf, will fail create.

[ 4080.876581] ------------[ cut here ]------------

[ 4080.876843] WARNING: CPU: 3 PID: 2015 at mm/page_alloc.c:4556 __alloc_pages+0x2c8/0x350

[ 4080.878839] RIP: 0010:__alloc_pages+0x2c8/0x350

[ 4080.879470] Call Trace:

[ 4080.879473] <TASK>

[ 4080.879473] ? __alloc_pages+0x2c8/0x350

[ 4080.879475] ? __warn.cold+0x8e/0xe8

[ 4080.880647] ? __alloc_pages+0x2c8/0x350

[ 4080.880909] ? report_bug+0xff/0x140

[ 4080.881175] ? handle_bug+0x3c/0x80

[ 4080.881556] ? exc_invalid_op+0x17/0x70

[ 4080.881559] ? asm_exc_invalid_op+0x1a/0x20

[ 4080.882077] ? udmabuf_create+0x131/0x400

Because MAX_PAGE_ORDER, kmalloc can max alloc 409

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 4.20, < 6.11.11	Affected

References

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

Frequently Asked Questions

What is CVE-2024-56544?

CVE-2024-56544 is a medium-severity vulnerability affecting linux linux_kernel. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56544?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56544?

How can CyberStrike help with CVE-2024-56544?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-56544 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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