Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10.0, < 5.10.36 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0Patch
- https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572aPatch
- https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628Patch
- https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ffPatch
- https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0Patch
- https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572aPatch
- https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628Patch
- https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ffPatch
FAQ
What is CVE-2021-46940?
CVE-2021-46940 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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)...
How severe is CVE-2021-46940?
CVE-2021-46940 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-46940?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.