#VU93187 Resource management error in Linux kernel - CVE-2021-47429

Vulnerability identifier: #VU93187

Vulnerability 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-2021-47429

CWE-ID: CWE-399

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 perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the die_mce() function in arch/powerpc/kernel/traps.c, within the EXC_COMMON_BEGIN() and END_FTR_SECTION_IFSET() functions in arch/powerpc/kernel/exceptions-64s.S. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/d7a8e38999fbd6910516e44cb43f9f4317e54f73
https://git.kernel.org/stable/c/f08fb25bc66986b0952724530a640d9970fa52c1

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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.