- Vulnerability/
- CVE-2025-37850
CVE-2025-37850: pwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config()
First published: Fri May 09 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: pwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config() With CONFIG_COMPILE_TEST && !CONFIG_HAVE_CLK, pwm_mediatek_config() has a divide-by-zero in the following line: do_div(resolution, clk_get_rate(pc->clk_pwms[pwm->hwpwm])); due to the fact that the !CONFIG_HAVE_CLK version of clk_get_rate() returns zero. This is presumably just a theoretical problem: COMPILE_TEST overrides the dependency on RALINK which would select COMMON_CLK. Regardless it's a good idea to check for the error explicitly to avoid divide-by-zero. Fixes the following warning: drivers/pwm/pwm-mediatek.o: warning: objtool: .text: unexpected end of section [ukleinek: s/CONFIG_CLK/CONFIG_HAVE_CLK/]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/8b9f60725d74b72c238e4437c957d0217746b506
- https://git.kernel.org/stable/c/e1206d8e1651c9f62e5640b69b14d925b1a0a00a
- https://git.kernel.org/stable/c/e3cf0c38d3ce754ad63005102fcfeb0b7ff3290b
- https://git.kernel.org/stable/c/f3e9cf266c2c103cf071e15d7a17e2c699fff3c5
- https://git.kernel.org/stable/c/8ddbec73ea2598d8414e8f7103241b55cf877010
- https://git.kernel.org/stable/c/4cb15042b5f3ec0474e91cf379120cc597625dbb
- https://git.kernel.org/stable/c/c343856ff2689ce0afef823592732fc178ef4aac
- https://git.kernel.org/stable/c/77fb96dbe350e8a5ae4965ff9f6e7049f3966a6b
- https://git.kernel.org/stable/c/7ca59947b5fcf94e7ea4029d1bd0f7c41500a161
Frequently Asked Questions
What is the severity of CVE-2025-37850?
CVE-2025-37850 is classified as a moderate severity vulnerability impacting the Linux kernel.
How do I fix CVE-2025-37850?
To fix CVE-2025-37850, users should update their Linux kernel to a version that includes the patch addressing the divide-by-zero issue.
What systems are affected by CVE-2025-37850?
CVE-2025-37850 affects systems running the Linux kernel with CONFIG_COMPILE_TEST and without CONFIG_HAVE_CLK.
What type of vulnerability is CVE-2025-37850?
CVE-2025-37850 is a divide-by-zero vulnerability related to the pwm_mediatek_config() function in the Linux kernel.
Is there a public disclosure for CVE-2025-37850?
Yes, CVE-2025-37850 was disclosed publicly and has been addressed in updated Linux kernel releases.
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