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CVE-2024-50142

5.5 · MEDIUM
Published Nov 7, 2024 linux EPSS 0.26% (17th pctl)

Overview

CVE-2024-50142 is a medium-severity vulnerability affecting linux linux_kernel. It was published on November 7, 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:

xfrm: validate new SA's prefixlen using SA family when sel.family is unset

This expands the validation introduced in commit 07bf7908950a ("xfrm:

Validate address prefix lengths in the xfrm selector.")

syzbot created an SA with

usersa.sel.family = AF_UNSPEC

usersa.sel.prefixlen_s = 128

usersa.family = AF_INET

Because of the AF_UNSPEC selector, verify_newsa_info doesn't put

limits on prefixlen_{s,d}. But then copy_from_user_state sets

x->sel.family to usersa.family (AF_INET). Do the same conversion in

verify_newsa_info before validating prefixlen_{s,d}, since that's how

prefixlen is going to be used later on.

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 >= 2.6.12, < 4.19.323 Affected

References

Ref git.kernel.org/stable/c/2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 Ref git.kernel.org/stable/c/3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 Ref git.kernel.org/stable/c/401ad99a5ae7180dd9449eac104cb755f442e7f3 Ref git.kernel.org/stable/c/7d9868180bd1e4cf37e7c5067362658971162366 Ref git.kernel.org/stable/c/8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 Ref git.kernel.org/stable/c/bce1afaa212ec380bf971614f70909a27882b862 Ref git.kernel.org/stable/c/e68dd80ba498265d2266b12dc3459164f4ff0c4a Ref git.kernel.org/stable/c/f31398570acf0f0804c644006f7bfa9067106b0a Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html Ref lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Frequently Asked Questions

What is CVE-2024-50142?

CVE-2024-50142 is a medium-severity vulnerability affecting linux linux_kernel. It was published on November 7, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-50142?

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-2024-50142?

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-2024-50142?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-50142 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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Continuous Pentesting

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Code Review

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HackBrowser

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

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