CVE-2025-37850

pwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config()

State: Published
Severity: Not scored
Published: May 9, 2025
Updated: May 11, 2026
Reserved: Apr 16, 2025

Read the record on cve.org

Description

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/]

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 8b9f60725d74b72c238e4437c957d0217746b506Affected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before e1206d8e1651c9f62e5640b69b14d925b1a0a00aAffected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before e3cf0c38d3ce754ad63005102fcfeb0b7ff3290bAffected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before f3e9cf266c2c103cf071e15d7a17e2c699fff3c5Affected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 8ddbec73ea2598d8414e8f7103241b55cf877010Affected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 4cb15042b5f3ec0474e91cf379120cc597625dbbAffected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before c343856ff2689ce0afef823592732fc178ef4aacAffected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 77fb96dbe350e8a5ae4965ff9f6e7049f3966a6bAffected caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 7ca59947b5fcf94e7ea4029d1bd0f7c41500a161Affected
LinuxLinux	4.12Affected before 4.12Not affected 5.4.293 through 5.4.Not affected 5.10.237 through 5.10.Not affected 5.15.181 through 5.15.Not affected 6.1.135 through 6.1.Not affected 6.6.88 through 6.6.Not affected 6.12.24 through 6.12.Not affected 6.13.12 through 6.13.Not affected 6.14.3 through 6.14.Not affected 6.15 and laterNot affected

Product

Versions

LinuxLinux

caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 8b9f60725d74b72c238e4437c957d0217746b506Affected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before e1206d8e1651c9f62e5640b69b14d925b1a0a00aAffected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before e3cf0c38d3ce754ad63005102fcfeb0b7ff3290bAffected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before f3e9cf266c2c103cf071e15d7a17e2c699fff3c5Affected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 8ddbec73ea2598d8414e8f7103241b55cf877010Affected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 4cb15042b5f3ec0474e91cf379120cc597625dbbAffected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before c343856ff2689ce0afef823592732fc178ef4aacAffected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 77fb96dbe350e8a5ae4965ff9f6e7049f3966a6bAffected
caf065f8fd583b43a3f95d84c8a0a0d07597963b to before 7ca59947b5fcf94e7ea4029d1bd0f7c41500a161Affected

LinuxLinux

4.12Affected
before 4.12Not affected
5.4.293 through 5.4.*Not affected
5.10.237 through 5.10.*Not affected
5.15.181 through 5.15.*Not affected
6.1.135 through 6.1.*Not affected
6.6.88 through 6.6.*Not affected
6.12.24 through 6.12.*Not affected
6.13.12 through 6.13.*Not affected
6.14.3 through 6.14.*Not affected
6.15 and laterNot affected

References

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