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CVE-2024-26840

5.5 · MEDIUM
Published Apr 17, 2024 linux CWE-401 EPSS 0.28% (20th pctl)

Overview

CVE-2024-26840 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 17, 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:

cachefiles: fix memory leak in cachefiles_add_cache()

The following memory leak was reported after unbinding /dev/cachefiles:

==================================================================

unreferenced object 0xffff9b674176e3c0 (size 192):

comm "cachefilesd2", pid 680, jiffies 4294881224

hex dump (first 32 bytes):

01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

backtrace (crc ea38a44b):

[<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370

[<ffffffff8e917f86>] prepare_creds+0x26/0x2e0

[<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120

[<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0

[<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0

[<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520

[<ffffffff8ebc5069>] ksys_write+0x69/0xf0

[<ffffffff8f6d4662>] do_syscall_64+0x72/0x140

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 >= 2.6.30, < 4.19.309 Affected

References

Ref git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 Ref git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 Ref git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 Ref git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 Ref git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 Ref git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a Ref git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 Ref git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444 Ref git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 Ref git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3

Frequently Asked Questions

What is CVE-2024-26840?

CVE-2024-26840 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 17, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26840?

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-2024-26840?

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.

How can CyberStrike help with CVE-2024-26840?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26840 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.

How CyberStrike Helps

Autonomous Discovery

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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