Vulnerability-Lookup

GHSA-R6PF-FX8P-436V

Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-02-14 18:30

Details

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().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23156"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-14T16:15:55Z",
    "severity": null
  },
  "details": "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().",
  "id": "GHSA-r6pf-fx8p-436v",
  "modified": "2026-02-14T18:30:15Z",
  "published": "2026-02-14T18:30:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23156"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

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

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

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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",
          "versions": [
            {
              "lessThan": "3960f1754664661a970dc9ebbab44ff93a0b4c42",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "510a16f1c5c1690b33504052bc13fbc2772c23f8",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "89b8ca709eeeabcc11ebba64806677873a2787a8",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "e4e15a0a4403c96d9898d8398f0640421df9cb16",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "versionType": "git"
            },
            {
              "lessThan": "4b22ec1685ce1fc0d862dcda3225d852fb107995",
              "status": "affected",
              "version": "2d82e6227ea189c0589e7383a36616ac2a2d248c",
              "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"
            },
            {
              "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:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.162",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.123",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.69",
                  "versionStartIncluding": "6.0",
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                },
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                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "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"
}

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

GHSA-R6PF-FX8P-436V

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

Tags

Sightings

Nomenclature