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CVE-2024-47686: ep93xx: clock: Fix off by one in ep93xx_div_recalc_rate()

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-21 · updated 2026-06-17
• Weakness: CWE-193

Description

In the Linux kernel, the following vulnerability has been resolved: ep93xx: clock: Fix off by one in ep93xx_div_recalc_rate() The psc->div[] array has psc->num_div elements. These values come from when we call clk_hw_register_div(). It's adc_divisors and ARRAY_SIZE(adc_divisors)) and so on. So this condition needs to be >= instead of > to prevent an out of bounds read.

Affected products

• Linux kernel: from 5.16 before 6.1.113; from 6.2 before 6.6.54; from 6.7 before 6.10.13; from 6.11 before 6.11.2 — fixed in 6.1.113, 6.10.13, 6.11.2, 6.6.54

How to fix

Upgrade to a fixed version: Linux kernel 6.1.113, 6.10.13, 6.11.2, 6.6.54. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/27f493e141823db052586010c1532b70b164507c
• https://git.kernel.org/stable/c/66e78ade976dbd9bea09166aa8d66afc0963cde4
• https://git.kernel.org/stable/c/7a5bd2fb92388c51d267f6ce57c40f1cca8af1e0
• https://git.kernel.org/stable/c/ae59eaf36a1ad396e9f657ec9b8b52da6206ed5f
• https://git.kernel.org/stable/c/c7f06284a6427475e3df742215535ec3f6cd9662
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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