#VU65005 Buffer overflow in Linux kernel - CVE-2022-32981

Vulnerability identifier: #VU65005

Vulnerability 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-2022-32981

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a boundary error in ptrace PEEKUSER and POKEUSER when accessing floating point registers on powerpc 32-bit platforms. A local user can trigger buffer overflow and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.19, 5.19

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=8e1278444446fc97778a5e5c99bca1ce0bbc5ec9
https://www.openwall.com/lists/oss-security/2022/06/14/3

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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.