Integer underflow in Linux kernel amd amdgpu driver

1) Integer underflow

EUVDB-ID: #VU99093

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-48990

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to integer underflow within the amdgpu_job_free_cb() function in drivers/gpu/drm/amd/amdgpu/amdgpu_job.c. A local user can execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.0 - 6.1 rc7

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.5:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/d2a89cd942edd50c1e652004fd64019be78b0a96
https://git.kernel.org/stable/c/3cb93f390453cde4d6afda1587aaa00e75e09617
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1

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.