#VU63496 Improper update of reference count in Linux kernel - CVE-2022-29581

Vulnerability identifier: #VU63496

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-2022-29581

CWE-ID: CWE-911

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 improper update of reference count in net/sched in Linux kernel. A local user can execute arbitrary code with root privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.18

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External links
https://kernel.dance/#3db09e762dc79584a69c10d74a6b98f89a9979f8
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3db09e762dc79584a69c10d74a6b98f89a9979f8
https://www.openwall.com/lists/oss-security/2022/05/18/2

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?