Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2024-40913

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: cachefiles: defer exposing anon_fd until after copy_to_user() succeeds After installing the anonymous fd, we can now see it in…

Published Jul 12, 2024CWE-416EPSS 0.29%

Overview

CVE-2024-40913 is a high-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

cachefiles: defer exposing anon_fd until after copy_to_user() succeeds

After installing the anonymous fd, we can now see it in userland and close

it. However, at this point we may not have gotten the reference count of

the cache, but we will put it during colse fd, so this may cause a cache

UAF.

So grab the cache reference count before fd_install(). In addition, by

kernel convention, fd is taken over by the user land after fd_install(),

and the kernel should not call close_fd() after that, i.e., it should call

fd_install() after everything is ready, thus fd_install() is called after

copy_to_user() succeeds.

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/4b4391e77a6bf24cba2ef1590e113d9b73b11039Refgit.kernel.org/stable/c/b9f58cdae6a364a3270fd6b6a46e0fd4f7f8ce32Refgit.kernel.org/stable/c/d2d3eb377a5d081bf2bed177d354a4f59b74da88Refgit.kernel.org/stable/c/eac51d9daacd61dcc93333ff6a890cf3efc8c1c0Refgit.kernel.org/stable/c/4b4391e77a6bf24cba2ef1590e113d9b73b11039Refgit.kernel.org/stable/c/b9f58cdae6a364a3270fd6b6a46e0fd4f7f8ce32Refgit.kernel.org/stable/c/d2d3eb377a5d081bf2bed177d354a4f59b74da88Refgit.kernel.org/stable/c/eac51d9daacd61dcc93333ff6a890cf3efc8c1c0Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-40913?

CVE-2024-40913 is a high-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-40913?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-40913?

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-2024-40913?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-40913 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.

Related HIGH CVEs from 2024

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999