Vulnerability-Lookup

FKIE_CVE-2023-53474

Vulnerability from fkie_nvd - Published: 2025-10-01 12:15 - Updated: 2026-01-20 16:55

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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. ]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "096DA06C-349D-4644-941B-A5877497A9B4",
              "versionEndExcluding": "5.10.180",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionStartIncluding": "5.11",
              "vulnerable": true
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "negate": false,
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        }
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    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/MCE/AMD: Use an u64 for bank_map\n\nThee maximum number of MCA banks is 64 (MAX_NR_BANKS), see\n\n  a0bc32b3cacf (\"x86/mce: Increase maximum number of banks to 64\").\n\nHowever, the bank_map which contains a bitfield of which banks to\ninitialize is of type unsigned int and that overflows when those bit\nnumbers are \u003e= 32, leading to UBSAN complaining correctly:\n\n  UBSAN: shift-out-of-bounds in arch/x86/kernel/cpu/mce/amd.c:1365:38\n  shift exponent 32 is too large for 32-bit type \u0027int\u0027\n\nChange the bank_map to a u64 and use the proper BIT_ULL() macro when\nmodifying bits in there.\n\n  [ bp: Rewrite commit message. ]"
    }
  ],
  "id": "CVE-2023-53474",
  "lastModified": "2026-01-20T16:55:02.000",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-01T12:15:49.687",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
    {
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    },
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2025-10-01 11:42

Title

x86/MCE/AMD: Use an u64 for bank_map

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e9…
	https://git.kernel.org/stable/c/11c58a0c1937c157d…
	https://git.kernel.org/stable/c/ba8ffb1251eb629c2…
	https://git.kernel.org/stable/c/9669fa17287c3af2b…
	https://git.kernel.org/stable/c/67bb7521b6420d81d…
	https://git.kernel.org/stable/c/4c1cdec319b9aadb6…

Impacted products

Vendor

Product

Version

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)

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)

Show details on NVD website

JSON

To clipboard

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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/cpu/mce/amd.c"
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          "vendor": "Linux",
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}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2023-53474

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

Tags

Sightings

Nomenclature