CVE-2026-23156 (GCVE-0-2026-23156)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-02-14 16:01
VLAI?
Title
efivarfs: fix error propagation in efivar_entry_get()
Summary
In the Linux kernel, the following vulnerability has been resolved: efivarfs: fix error propagation in efivar_entry_get() efivar_entry_get() always returns success even if the underlying __efivar_entry_get() fails, masking errors. This may result in uninitialized heap memory being copied to userspace in the efivarfs_file_read() path. Fix it by returning the error from __efivar_entry_get().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 3960f1754664661a970dc9ebbab44ff93a0b4c42 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 510a16f1c5c1690b33504052bc13fbc2772c23f8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 89b8ca709eeeabcc11ebba64806677873a2787a8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < e4e15a0a4403c96d9898d8398f0640421df9cb16 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 4b22ec1685ce1fc0d862dcda3225d852fb107995 (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.123 , ≤ 6.6.* (semver)
Unaffected: 6.12.69 , ≤ 6.12.* (semver)
Unaffected: 6.18.9 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/efivarfs/vars.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.123",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.69",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.6.123",
                  "versionStartIncluding": "6.0",
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                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: fix error propagation in efivar_entry_get()\n\nefivar_entry_get() always returns success even if the underlying\n__efivar_entry_get() fails, masking errors.\n\nThis may result in uninitialized heap memory being copied to userspace\nin the efivarfs_file_read() path.\n\nFix it by returning the error from __efivar_entry_get()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:01:23.215Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42"
        },
        {
          "url": "https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8"
        },
        {
          "url": "https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995"
        }
      ],
      "title": "efivarfs: fix error propagation in efivar_entry_get()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23156",
    "datePublished": "2026-02-14T16:01:23.215Z",
    "dateReserved": "2026-01-13T15:37:45.978Z",
    "dateUpdated": "2026-02-14T16:01:23.215Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23156\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T16:15:55.760\",\"lastModified\":\"2026-02-18T17:52:44.520\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nefivarfs: fix error propagation in efivar_entry_get()\\n\\nefivar_entry_get() always returns success even if the underlying\\n__efivar_entry_get() fails, masking errors.\\n\\nThis may result in uninitialized heap memory being copied to userspace\\nin the efivarfs_file_read() path.\\n\\nFix it by returning the error from __efivar_entry_get().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nefivarfs: correcci\u00f3n de la propagaci\u00f3n de errores en efivar_entry_get()\\n\\nefivar_entry_get() siempre devuelve \u00e9xito incluso si la funci\u00f3n subyacente __efivar_entry_get() falla, enmascarando errores.\\n\\nEsto puede resultar en que memoria de pila no inicializada sea copiada al espacio de usuario en la ruta de efivarfs_file_read().\\n\\nSe soluciona devolviendo el error desde __efivar_entry_get().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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