Memory leak in Linux kernel powerpc kernel

1) Memory leak

EUVDB-ID: #VU104369

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-2022-49113

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 format_show() function in arch/powerpc/kernel/secvar-sysfs.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 5.18 rc8

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.10.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/02222bf4f0a27f6eba66d1f597cdb5daadd51829
https://git.kernel.org/stable/c/2a71e3ecd829a82013cf095c55068c61d991e885
https://git.kernel.org/stable/c/c105ffb6b9744158e37e9f81f0f38861951d1c1f
https://git.kernel.org/stable/c/d05e4265d33af60b39606c20c731e3e719bfe3d6
https://git.kernel.org/stable/c/d601fd24e6964967f115f036a840f4f28488f63f
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.111
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.34
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.20
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18

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.