In the Linux kernel, the following vulnerability has been resolved:
x86/MCE/AMD: Use an u64 for bank_map
Thee maximum number of MCA banks is 64 (MAX_NR_BANKS), see
a0bc32b3cacf ("x86/mce: Increase maximum number of banks to 64").
However, the bank_map which contains a bitfield of which banks to
initialize is of type unsigned int and that overflows when those bit
numbers are >= 32, leading to UBSAN complaining correctly:
UBSAN: shift-out-of-bounds in arch/x86/kernel/cpu/mce/amd.c:1365:38
shift exponent 32 is too large for 32-bit type 'int'
Change the bank_map to a u64 and use the proper BIT_ULL() macro when
modifying bits in there.
[ bp: Rewrite commit message. ]
References
Configurations
Configuration 1 (hide)
|
History
20 Jan 2026, 16:55
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098 - Patch | |
| References | () https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 - Patch | |
| References | () https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4 - Patch | |
| References | () https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e - Patch | |
| References | () https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 - Patch | |
| References | () https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-190 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-01 12:15
Updated : 2026-01-20 16:55
NVD link : CVE-2023-53474
Mitre link : CVE-2023-53474
CVE.ORG link : CVE-2023-53474
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-190
Integer Overflow or Wraparound