CVE-2024-56611

5.5 · MEDIUM

Published Dec 27, 2024 linux CWE-476 EPSS 0.21% (11th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-56611 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:

mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM

We currently assume that there is at least one VMA in a MM, which isn't

true.

So we might end up having find_vma() return NULL, to then de-reference

NULL. So properly handle find_vma() returning NULL.

This fixes the report:

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI

KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]

CPU: 1 UID: 0 PID: 6021 Comm: syz-executor284 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024

RIP: 0010:migrate_to_node mm/mempolicy.c:1090 [inline]

RIP: 0010:do_migrate_pages+0x403/0x6f0 mm/mempolicy.c:1194

Code: ...

RSP: 0018:ffffc9000375fd08 EFLAGS: 00010246

RAX: 0000000000000000 RBX: ffffc9000375fd78 RCX: 0000000000000000

RDX: ff

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	>= 2.6.16, < 6.6.66	Affected

References

Ref git.kernel.org/stable/c/091c1dd2d4df6edd1beebe0e5863d4034ade9572 Ref git.kernel.org/stable/c/42d9fe2adf8613f9eea1f0c2619c9e2611eae0ea Ref git.kernel.org/stable/c/a13b2b9b0b0b04612c7d81e3b3dfb485c5f7abc3

Frequently Asked Questions

What is CVE-2024-56611?

CVE-2024-56611 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-2024-56611?

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-2024-56611?

How can CyberStrike help with CVE-2024-56611?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-56611 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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