Use-after-free in Linux kernel trace

1) Use-after-free

EUVDB-ID: #VU97780

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-46845

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 this_cpu_tmr_var() and timerlat_fd_release() functions in kernel/trace/trace_osnoise.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/8c72f0b2c45f21cb8b00fc37f79f632d7e46c2ed
http://git.kernel.org/stable/c/8a9d0d405159e9c796ddf771f7cff691c1a2bc1e
http://git.kernel.org/stable/c/e6a53481da292d970d1edf0d8831121d1c5e2f0d

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.