CVE-2026-46293
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
In the Linux kernel, an out-of-bounds access vulnerability was found during output registration in the mpfs-ccc driver. The issue arises from insufficient space allocation in the hws array, which does not account for DLL identifiers, leading to memory access beyond allocated bounds.
Risk Assessment
This vulnerability could cause system instability, information leaks, or crashes, posing a risk to the stability and security of systems using Microchip PolarFire devices.
Recommendation
Immediately update the Linux kernel to a version containing the fix that decrements PLL output IDs when adding them to the array to prevent out-of-bounds access.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: clk: microchip: mpfs-ccc: fix out of bounds access during output registration UBSAN reported an out of bounds access during registration of the last two outputs. This out of bounds access occurs because space is only allocated in the hws array for two PLLs and the four output dividers that each has, but the defined IDs contain two DLLS and their two outputs each, which are not supported by the driver. The ID order is PLLs -> DLLs -> PLL outputs -> DLL outputs. Decrement the PLL output IDs by two while adding them to the array to avoid the problem.