CVE-2026-31423

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A divide-by-zero error exists in the rtsc min() function within the concave-curve intersection path. The m2sm() function converts a u32 slope to a u64 scaled value; for large inputs, this result can reach 2^32. The rtsc min() function stores the difference of two such u64 values in a u32 variable dsm and uses it as a divisor. When the difference is exactly 2^32, truncation results in zero, leading to a system crash.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.