Denial of service in Linux kernel LBR

1) Out-of-bounds read

EUVDB-ID: #VU88821

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52476

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the branch_type() and get_branch_type() functions in arch/x86/events/utils.c. A local user can trigger an out-of-bounds read error and crash the kernel.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/403d201d1fd144cb249836dafb222f6375871c6c
http://git.kernel.org/stable/c/3863989497652488a50f00e96de4331e5efabc6c
http://git.kernel.org/stable/c/f71edacbd4f99c0e12fe4a4007ab4d687d0688db
http://git.kernel.org/stable/c/e53899771a02f798d436655efbd9d4b46c0f9265

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.