#VU104705 Improper locking in Linux kernel - CVE-2022-49133

Vulnerability identifier: #VU104705

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-2022-49133

CWE-ID: CWE-667

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 improper locking within the svm_range_restore_work() and svm_range_list_fini() functions in drivers/gpu/drm/amd/amdkfd/kfd_svm.c, within the kfd_process_notifier_release() function in drivers/gpu/drm/amd/amdkfd/kfd_process.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.16, 5.16 rc1, 5.16 rc2, 5.16 rc3, 5.16 rc4, 5.16 rc5, 5.16 rc6, 5.16 rc8, 5.16.0, 5.16.1, 5.16.2, 5.16.3, 5.16.4, 5.16.5, 5.16.6, 5.16.7, 5.16.8, 5.16.9, 5.16.10, 5.16.11, 5.16.12, 5.16.13, 5.16.14, 5.16.15, 5.16.16, 5.16.17, 5.16.18, 5.16.19

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External links
https://git.kernel.org/stable/c/6225bb3a88d22594aacea2485dc28ca12d596721
https://git.kernel.org/stable/c/858822905f4bf44100d63c5e22e263109976f7cb
https://git.kernel.org/stable/c/a6be83086e91891081e0589e4b4645bf4643e897
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.20

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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.