SB2024082642 - Use-after-free in Linux kernel trace

Description

This security bulletin contains information about 1 security vulnerability.

1) Use-after-free (CVE-ID: CVE-2024-43891)

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.

Remediation

Install update from vendor's website.

References

• 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