#VU104403 Memory leak in Linux kernel - CVE-2021-4453

Vulnerability identifier: #VU104403

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-2021-4453

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 smu_v12_0_fini_smc_tables() function in drivers/gpu/drm/amd/pm/swsmu/smu12/smu_v12_0.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/222cebd995cdf11fe0d502749560f65e64990e55
https://git.kernel.org/stable/c/257b3bb16634fd936129fe2f57a91594a75b8751
https://git.kernel.org/stable/c/aa464957f7e660abd554f2546a588f6533720e21

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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.