Denial of service in Linux kernel posix clock

1) Memory leak

EUVDB-ID: #VU88147

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26655

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the posix_clock_open() function in kernel/time/posix-clock.c. A local user can perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.8 - 6.8.2

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8.2:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8
https://git.kernel.org/stable/c/a88649b49523e8cbe95254440d803e38c19d2341
https://git.kernel.org/stable/c/0200dd7ed2335469955d7e69cc1a6fa7df1f3847
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8.3

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.