CVE-2021-46940: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: tools/power turbostat: Fix offset overflow issue in index converting The idx_to_offset() function returns type int (32-bit signed), but MSR_PKG_ENERGY_STAT is u32 and would be interpreted as a negative number. The end result is that it hits the if (offset < 0) check in update_msr_sum() which prevents the timer callback from updating the stat in the background when long durations are used. The similar issue exists in offset_to_idx() and update_msr_sum(). Fix this issue by converting the 'int' to 'off_t' accordingly.

Affected products

• Linux Linux Kernel: from 5.10.0, before 5.10.36 (fixed in 5.10.36); from 5.11.0, before 5.11.20 (fixed in 5.11.20); from 5.12.0, before 5.12.3 (fixed in 5.12.3)

Published 2024-02-27. Last modified 2026-06-17.