Use-after-free in Linux kernel trace



| Updated: 2025-05-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-43891
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU96514

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-43891

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the trigger_start(), event_trigger_regex_open() and event_trigger_regex_write() functions in kernel/trace/trace_events_trigger.c, within the event_inject_write() function in kernel/trace/trace_events_inject.c, within the hist_show() and hist_debug_show() functions in kernel/trace/trace_events_hist.c, within the event_enable_read(), event_enable_write(), f_next(), f_show(), event_filter_read(), event_filter_write() and event_callback() functions in kernel/trace/trace_events.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.10.4

CPE2.3 External links

https://git.kernel.org/stable/c/531dc6780d94245af037c25c2371c8caf652f0f9
https://git.kernel.org/stable/c/b1560408692cd0ab0370cfbe9deb03ce97ab3f6d
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10.5
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.49


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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