CVE-2023-53474

MEDIUM EPSS 4.2%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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. ]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥5.10  –  <5.10.180
linuxlinux_kernel*≥5.11  –  <5.15.111
linuxlinux_kernel*≥5.16  –  <6.1.28
linuxlinux_kernel*≥6.2  –  <6.2.15
linuxlinux_kernel*≥6.3  –  <6.3.2

References 6

  • git.kernel.org https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7
    Patch