Integer underflow in Linux kernel clk qcom driver

1) Integer underflow

EUVDB-ID: #VU104795

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-2022-49189

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 clk_rcg2_determine_floor_rate() and __clk_rcg2_configure() functions in drivers/clk/qcom/clk-rcg2.c. A local user can execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/334720f418f57b1d969dad2117b21f9388cb9395
https://git.kernel.org/stable/c/34dca60982e93e69ae442aa2d36ce61c9a3bb563
https://git.kernel.org/stable/c/52592f9afbfe01bce8f8953e4f19cbe3bcbdbd3a
https://git.kernel.org/stable/c/58922910add18583d5273c2edcdb9fd7bf4eca02
https://git.kernel.org/stable/c/96888f0dcf351e758b9df57e015a48427ca709c1
https://git.kernel.org/stable/c/a4e2e31971354790b0d1fa3e783452a9d135fcff

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.