CVE-2023-53474 (GCVE-0-2023-53474)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2026-08-05 09:14
VLAI
Title
x86/MCE/AMD: Use an u64 for bank_map
Summary
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. ]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83 (git)
Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < 11c58a0c1937c157dbdf82d5ab634d68c99f3098 (git)
Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < ba8ffb1251eb629c2ec35220e3896cf4f7b888a7 (git)
Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < 9669fa17287c3af2bbd4868d4c8fdd9e57f8332e (git)
Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < 67bb7521b6420d81dab7538c0686f18f7d6d09f4 (git)
Affected: a0bc32b3cacf194dc479b342f006203fd1e1941a , < 4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.180 , ≤ 5.10.* (semver)
Unaffected: 5.15.111 , ≤ 5.15.* (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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      "current_release_date": "2026-08-04T22:55:23+00:00",
      "cve": "CVE-2023-53474",
      "id": "CVE-2023-53474",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: x86/MCE/AMD: Use an u64 for bank_map",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53474.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:07:15Z",
      "cve": "CVE-2023-53474",
      "id": "CVE-2023-53474",
      "initial_release_date": "2025-10-01T23:30:34Z",
      "product_status:known_affected": "344",
      "product_status:known_not_affected": "395",
      "product_status:recommended": "206",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53474",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53474.json",
      "version": "21"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.