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FKIE_CVE-2023-52976

Vulnerability from fkie_nvd - Published: 2025-03-27 17:15 - Updated: 2026-06-17 06:44
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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: efi: fix potential NULL deref in efi_mem_reserve_persistent When iterating on a linked list, a result of memremap is dereferenced without checking it for NULL. This patch adds a check that falls back on allocating a new page in case memremap doesn't succeed. Found by Linux Verification Center (linuxtesting.org) with SVACE. [ardb: return -ENOMEM instead of breaking out of the loop]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
linux linux_kernel 6.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/efi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d92a25627bcdf264183670da73c9a60c0bac327e",
              "status": "affected",
              "version": "18df7577adae6c6c778bf774b3aebcacbc1fb439",
              "versionType": "git"
            },
            {
              "lessThan": "87d4ff18738fd71e7e3c10827c80257da6283697",
              "status": "affected",
              "version": "18df7577adae6c6c778bf774b3aebcacbc1fb439",
              "versionType": "git"
            },
            {
              "lessThan": "d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c",
              "status": "affected",
              "version": "18df7577adae6c6c778bf774b3aebcacbc1fb439",
              "versionType": "git"
            },
            {
              "lessThan": "a2e6a9ff89f13666a1c3ff7195612ab949ea9afc",
              "status": "affected",
              "version": "18df7577adae6c6c778bf774b3aebcacbc1fb439",
              "versionType": "git"
            },
            {
              "lessThan": "966d47e1f27c45507c5df82b2a2157e5a4fd3909",
              "status": "affected",
              "version": "18df7577adae6c6c778bf774b3aebcacbc1fb439",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b5961ecad7121fec138ebee7d9eba4863f9dc6e7",
              "versionType": "git"
            },
            {
              "lessThan": "5.2",
              "status": "affected",
              "version": "5.1.16",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/efi/efi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.232",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "18646628-F802-483F-908E-156FA8C631A5",
              "versionEndExcluding": "5.4.232",
              "versionStartIncluding": "5.1.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "12258A3F-04BD-49C9-9C6B-D3C1945E8910",
              "versionEndExcluding": "5.10.168",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "98FAC10E-42A0-4372-B1A0-A49CF672890E",
              "versionEndExcluding": "5.15.93",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "535D03F4-DA02-49FE-934E-668827E6407B",
              "versionEndExcluding": "6.1.11",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "725C78C9-12CE-406F-ABE8-0813A01D66E8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "A127C155-689C-4F67-B146-44A57F4BFD85",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "D34127CC-68F5-4703-A5F6-5006F803E4AE",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "4AB8D555-648E-4F2F-98BD-3E7F45BD12A8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: fix potential NULL deref in efi_mem_reserve_persistent\n\nWhen iterating on a linked list, a result of memremap is dereferenced\nwithout checking it for NULL.\n\nThis patch adds a check that falls back on allocating a new page in\ncase memremap doesn\u0027t succeed.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.\n\n[ardb: return -ENOMEM instead of breaking out of the loop]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: efi: se corrige una posible desreferenciaci\u00f3n NULL en efi_mem_reserve_persistent. Al iterar en una lista enlazada, se desreferencia un resultado de memremap sin comprobar si es NULL. Este parche a\u00f1ade una comprobaci\u00f3n que recurre a la asignaci\u00f3n de una nueva p\u00e1gina en caso de que memremap no tenga \u00e9xito. Encontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con SVACE. [ardb: devuelve -ENOMEM en lugar de salir del bucle]"
    }
  ],
  "id": "CVE-2023-52976",
  "lastModified": "2026-06-17T06:44:02.310",
  "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"
      },
      {
        "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-52976",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T17:22:07.723841Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-03-27T17:15:44.657",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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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

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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.