#VU90441 Memory leak in Linux kernel - CVE-2021-47490

Vulnerability identifier: #VU90441

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-2021-47490

CWE-ID: CWE-401

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 memory leak within the ttm_transfered_destroy() function in drivers/gpu/drm/ttm/ttm_bo_util.c. 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/bd99782f3ca491879e8524c89b1c0f40071903bd
https://git.kernel.org/stable/c/960b1fdfc39aba8f41e9e27b2de0c925c74182d9
https://git.kernel.org/stable/c/c21b4002214c1c7e7b627b9b53375612f7aab6db
https://git.kernel.org/stable/c/bbc920fb320f1c241cc34ac85edaa0058922246a
https://git.kernel.org/stable/c/132a3d998d6753047f22152731fba2b0d6b463dd
https://git.kernel.org/stable/c/0db55f9a1bafbe3dac750ea669de9134922389b5

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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.