PT-2024-30749 · Linux+4 · Linux Kernel+4

Mathias Krause + 1 · Published 2024-08-07 · Updated 2025-09-29 · CVE-2024-43891

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/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 tracing system. When eventfs was introduced, special care was taken to coordinate the freeing of file meta data with files exposed to user space. However, a shortcut was made for the "format" file, which did not check the file's meta data flag EVENT FILE FL FREED before accessing the event. This caused a race condition that could be triggered via the user events test and running a loop to read user events format files, resulting in a use-after-free bug report. A new helper function event file file() was added to ensure the event mutex is held and return NULL if the trace event file has the EVENT FILE FL FREED flag set.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALSA-2025_16880

ALT-PU-2024-12968

AZL-48692

BDU:2025-01969

CVE-2024-43891

OESA-2024-2124

USN-7154-1

USN-7154-2

USN-7155-1

USN-7156-1

USN-7196-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 740

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43891.json · Exploit
• https://ubuntu.com/security/CVE-2024-41079 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46753 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-53057 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42295 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46795 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-45026 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42127 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46815 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-43891 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-43891 · Security Note
• https://ubuntu.com/security/CVE-2024-46825 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-43895 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42238 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42278 · Vendor Advisory