efivarfs: fix error propagation in efivar_entry_get()

{
  "id": "0d12610cdba05d97f0ff990bbc7b7985cbc55ca2e230fb8992ac301be02fe662",
  "url": "https://osv.dev/vulnerability/CVE-2026-23156",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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().",
    "evidence": "osv:CVE-2026-23156",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.162",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.123",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.69",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23156",
      "aliases": [
        "CVE-2026-23156"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2d82e6227ea189c0589e7383a36616ac2a2d248c"
                },
                {
                  "fixed": "3960f1754664661a970dc9ebbab44ff93a0b4c42"
                },
                {
                  "fixed": "510a16f1c5c1690b33504052bc13fbc2772c23f8"
                },
                {
                  "fixed": "89b8ca709eeeabcc11ebba64806677873a2787a8"
                },
                {
                  "fixed": "e4e15a0a4403c96d9898d8398f0640421df9cb16"
                },
                {
                  "fixed": "4b22ec1685ce1fc0d862dcda3225d852fb107995"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23156.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.1.162"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.123"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.69"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23156.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.347900193Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42",
        "https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995",
        "https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8",
        "https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8",
        "https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23156.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23156",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23156.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23156",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 507865,
  "published_at": "2026-02-14T16:01:23.215+00:00"
}