#VU104645 NULL pointer dereference in Linux kernel - CVE-2022-49203

Vulnerability identifier: #VU104645

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-2022-49203

CWE-ID: CWE-476

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 NULL pointer dereference within the link_enc_cfg_init() function in drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c, within the dm_resume() function in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1

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External links
https://git.kernel.org/stable/c/32685b32d825ca08c5dec826477332df886c4743
https://git.kernel.org/stable/c/bbfcdd6289ba6f00f0cd7d496946dce9f6c600ac
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.2

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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.