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CVE-2024-44965

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that ha…

Published Sep 4, 2024EPSS 0.22%

Overview

CVE-2024-44965 is a medium-severity vulnerability. It was published on September 4, 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:

x86/mm: Fix pti_clone_pgtable() alignment assumption

Guenter reported dodgy crashes on an i386-nosmp build using GCC-11

that had the form of endless traps until entry stack exhaust and then

#DF from the stack guard.

It turned out that pti_clone_pgtable() had alignment assumptions on

the start address, notably it hard assumes start is PMD aligned. This

is true on x86_64, but very much not true on i386.

These assumptions can cause the end condition to malfunction, leading

to a 'short' clone. Guess what happens when the user mapping has a

short copy of the entry text?

Use the correct increment form for addr to avoid alignment

assumptions.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refgit.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9eRefgit.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8Refgit.kernel.org/stable/c/41e71dbb0e0a0fe214545fe64af031303a08524cRefgit.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346Refgit.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763Refgit.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2edRefgit.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6Refgit.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758ab3c35cReflists.debian.org/debian-lts-announce/2024/10/msg00003.htmlReflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-44965?

CVE-2024-44965 is a medium-severity vulnerability. It was published on September 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-44965?

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-2024-44965?

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

How can CyberStrike help with CVE-2024-44965?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-44965 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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