CVE-2021-46940 (GCVE-0-2021-46940)

Vulnerability from cvelistv5 – Published: 2024-02-27 18:40 – Updated: 2025-05-04 07:00
VLAI?
Title
tools/power turbostat: Fix offset overflow issue in index converting
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9972d5d84d76982606806b2ce887f70c2f8ba60a , < ea6803ff2cd1a2d7d880256bf562172b708a76ff (git)
Affected: 9972d5d84d76982606806b2ce887f70c2f8ba60a , < dbdf22fc825fdb1d97f23230064e0f9819471628 (git)
Affected: 9972d5d84d76982606806b2ce887f70c2f8ba60a , < 337b1546cde87fb8588ddaedf0201b769baa572a (git)
Affected: 9972d5d84d76982606806b2ce887f70c2f8ba60a , < 13a779de4175df602366d129e41782ad7168cef0 (git)
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    Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.36 , ≤ 5.10.* (semver)
Unaffected: 5.11.20 , ≤ 5.11.* (semver)
Unaffected: 5.12.3 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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