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CVE-2022-49189: clk: qcom: clk-rcg2: Update logic to calculate D value for RCG

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: clk: qcom: clk-rcg2: Update logic to calculate D value for RCG The display pixel clock has a requirement on certain newer platforms to support M/N as (2/3) and the final D value calculated results in underflow errors. As the current implementation does not check for D value is within the accepted range for a given M & N value. Update the logic to calculate the final D value based on the range.

Affected products

• Linux kernel: from 3.16 before 5.4.189; from 5.5 before 5.10.110; from 5.11 before 5.15.33; from 5.16 before 5.16.19; from 5.17 before 5.17.2 — fixed in 5.10.110, 5.15.33, 5.16.19, 5.17.2, 5.4.189

How to fix

Upgrade to a fixed version: Linux kernel 5.10.110, 5.15.33, 5.16.19, 5.17.2. Check the vendor advisory for mitigations.

References

• 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

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