Vulnerability-Lookup

FKIE_CVE-2026-23156

Vulnerability from fkie_nvd - Published: 2026-02-14 16:15 - Updated: 2026-03-18 14:40

Severity ?

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

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().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83DE4E0F-B87E-49B8-B0C7-D01CE9B22054",
              "versionEndExcluding": "6.1.162",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            },
            {
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              "versionEndExcluding": "6.6.123",
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            },
            {
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              "versionEndExcluding": "6.18.9",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298",
              "vulnerable": true
            },
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              "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC",
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            },
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              "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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()."
    }
  ],
  "id": "CVE-2026-23156",
  "lastModified": "2026-03-18T14:40:43.860",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-14T16:15:55.760",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-02-14 16:01

Title

efivarfs: fix error propagation in efivar_entry_get()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3960f1754664661a9…
	https://git.kernel.org/stable/c/510a16f1c5c1690b3…
	https://git.kernel.org/stable/c/89b8ca709eeeabcc1…
	https://git.kernel.org/stable/c/e4e15a0a4403c96d9…
	https://git.kernel.org/stable/c/4b22ec1685ce1fc0d…

Impacted products

Vendor

Product

Version

Linux

Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 3960f1754664661a970dc9ebbab44ff93a0b4c42 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 510a16f1c5c1690b33504052bc13fbc2772c23f8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 89b8ca709eeeabcc11ebba64806677873a2787a8 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < e4e15a0a4403c96d9898d8398f0640421df9cb16 (git)
Affected: 2d82e6227ea189c0589e7383a36616ac2a2d248c , < 4b22ec1685ce1fc0d862dcda3225d852fb107995 (git)

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)

Show details on NVD website

JSON

To clipboard

{
  "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",
          "versions": [
            {
              "lessThan": "3960f1754664661a970dc9ebbab44ff93a0b4c42",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
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              "lessThan": "510a16f1c5c1690b33504052bc13fbc2772c23f8",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "e4e15a0a4403c96d9898d8398f0640421df9cb16",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "4b22ec1685ce1fc0d862dcda3225d852fb107995",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/efivarfs/vars.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "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"
            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                {
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          "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()."
        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995"
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  "cveMetadata": {
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    "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"
  },
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  "dataVersion": "5.2"
}

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-2026-23156

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

Tags

Sightings

Nomenclature