CVE-2021-46940

published 2024-02-27

CVE-2021-46940: In the Linux kernel, the following vulnerability has been resolved: tools/power turbostat: Fix offset overflow issue in index converting The idx_to_offset()…

Priority P4 21 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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

13 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.10.38-1 (bookworm)	linux 5.10.38-1 (bookworm)
linux	linux	—	—
linux	linux	>= 9972d5d84d76982606806b2ce887f70c2f8ba60a < ea6803ff2cd1a2d7d880256bf562172b708a76ff	ea6803ff2cd1a2d7d880256bf562172b708a76ff
linux	linux	>= 9972d5d84d76982606806b2ce887f70c2f8ba60a < dbdf22fc825fdb1d97f23230064e0f9819471628	dbdf22fc825fdb1d97f23230064e0f9819471628
linux	linux	>= 9972d5d84d76982606806b2ce887f70c2f8ba60a < 337b1546cde87fb8588ddaedf0201b769baa572a	337b1546cde87fb8588ddaedf0201b769baa572a
linux	linux	>= 9972d5d84d76982606806b2ce887f70c2f8ba60a < 13a779de4175df602366d129e41782ad7168cef0	13a779de4175df602366d129e41782ad7168cef0
linux	linux_kernel	>= 0 < 5.10.38-1	5.10.38-1
linux	linux_kernel	>= 0 < 5.10.38-1	5.10.38-1
linux	linux_kernel	>= 0 < 5.10.38-1	5.10.38-1
linux	linux_kernel	>= 0 < 5.10.38-1	5.10.38-1
linux	linux_kernel	>= 5.10.0 < 5.10.36	5.10.36
linux	linux_kernel	>= 5.11.0 < 5.11.20	5.11.20
linux	linux_kernel	>= 5.12.0 < 5.12.3	5.12.3

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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CWE-190