PT-2025-40181 · Linux+2 · Linux Kernel+2
Published
2023-01-27
·
Updated
2026-01-20
·
CVE-2023-53474
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw in the x86/MCE/AMD code where the
bank map variable, used to track initialized Machine Check Architecture (MCA) banks, is of type unsigned int. This can lead to a shift-out-of-bounds error when the number of MCA banks exceeds 32, triggering a UBSAN (Undefined Behavior Sanitizer) complaint. The issue arises because the maximum number of MCA banks is 64, but the bank map variable cannot represent values beyond 31. The fix involves changing the bank map to an u64 type and using the BIT ULL() macro for bit manipulation.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Integer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse