CVE-2024-50191

5.5 · MEDIUM

Published Nov 8, 2024 linux 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-2024-50191 is a medium-severity vulnerability affecting linux linux_kernel. It was published on November 8, 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:

ext4: don't set SB_RDONLY after filesystem errors

When the filesystem is mounted with errors=remount-ro, we were setting

SB_RDONLY flag to stop all filesystem modifications. We knew this misses

proper locking (sb->s_umount) and does not go through proper filesystem

remount procedure but it has been the way this worked since early ext2

days and it was good enough for catastrophic situation damage

mitigation. Recently, syzbot has found a way (see link) to trigger

warnings in filesystem freezing because the code got confused by

SB_RDONLY changing under its hands. Since these days we set

EXT4_FLAGS_SHUTDOWN on the superblock which is enough to stop all

filesystem modifications, modifying SB_RDONLY shouldn't be needed. So

stop doing that.

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	>= 0, < 5.15.168	Affected

References

Ref git.kernel.org/stable/c/58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9 Ref git.kernel.org/stable/c/d3476f3dad4ad68ae5f6b008ea6591d1520da5d8 Ref git.kernel.org/stable/c/ee77c388469116565e009eaa704a60bc78489e09 Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-50191?

CVE-2024-50191 is a medium-severity vulnerability affecting linux linux_kernel. It was published on November 8, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-50191?

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-2024-50191?

How can CyberStrike help with CVE-2024-50191?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-50191 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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