CVE-2021-46940

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-190

Affected software

VendorProductVersions
LinuxLinux>= 9972d5d84d76982606806b2ce887f70c2f8ba60a, < ea6803ff2cd1a2d7d880256bf562172b708a76ff; >= 9972d5d84d76982606806b2ce887f70c2f8ba60a, < dbdf22fc825fdb1d97f23230064e0f9819471628; >= 9972d5d84d76982606806b2ce887f70c2f8ba60a, < 337b1546cde87fb8588ddaedf0201b769baa572a; >= 9972d5d84d76982606806b2ce887f70c2f8ba60a, < 13a779de4175df602366d129e41782ad7168cef0
LinuxLinux5.10

References

Timeline

Published
Feb 27, 2024
Last modified
Jun 17, 2026
NVD status
Modified

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