PT-2024-33951 · Linux+3 · Linux Kernel+3

Syzbot · Published 2024-09-19 · Updated 2025-09-29 · CVE-2024-50118

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: A vulnerability in the Linux kernel has been resolved, related to the btrfs file system. The issue occurs when mounting a subvolume with different RO/RW flags, causing a null pointer dereference in the super block writeback. This happens because the option/features check is skipped during reconfiguration, leading to a restart of the v2 cache clearing and conversion back to v1 cache, triggering file system writes. The vulnerability is caused by the introduction of two workarounds to support mounting different subvolumes with different RO/RW flags for the new mount APIs.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2025_16880

ALT-PU-2024-17211

BDU:2025-13911

CVE-2024-50118

OPENSUSE-SU-2024:14500-1

OPENSUSE-SU-2025:14705-1

USN-7276-1

USN-7277-1

USN-7310-1

USN-7449-1

USN-7449-2

USN-7450-1

USN-7451-1

USN-7452-1

USN-7453-1

USN-7468-1

USN-7523-1

USN-7524-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Ubuntu

References · 1593

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50118.json · Exploit
• https://ubuntu.com/security/CVE-2024-53166 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50059 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56602 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56594 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50185 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50016 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-49943 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50249 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50211 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-49907 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-49868 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50205 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50151 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-50277 · Vendor Advisory