{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8646a3b5ee3a5b384a22a721f37c24274d974045"
            },
            {
              "fixed": "21243c15e1d31f0df1517435e3a7784747f19043"
            },
            {
              "fixed": "cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828"
            },
            {
              "fixed": "0f9aad08424882dd5714b53d29ae044060890752"
            },
            {
              "fixed": "b699e5c1f63a9e79946c35598c8a6f7af2c356b8"
            },
            {
              "fixed": "2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81013.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: fix heap OOB read on empty password write\n\nvalidate_password_input() computes length = strlen(buf) and then\nchecks buf[length - 1] to strip a trailing newline, without checking\nthat length is nonzero first. Writing an empty string (a bare '\\n')\nto current_password or new_password gives length == 0, and\nbuf[length - 1] reads buf[-1], one byte before the heap allocation\nholding the copied input.\n\nKASAN confirms this directly:\n\n  BUG: KASAN: slab-out-of-bounds in store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]\n  Read of size 1 at addr ffff88811bd8da9f by task sh/13740\n  ...\n  store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]\n  current_password_store+0x14/0x20 [hp_bioscfg]\n  ...\n  The buggy address is located 23 bytes to the right of\n  allocated 8-byte region [ffff88811bd8da80, ffff88811bd8da88)\n\nReproduced identically via new_password_store. Execution continues\npast the bad read (the garbage byte only affects whether \"length\" is\ndecremented by one), so the write completes and returns success; this\nis a pure information read past the buffer, not a crash, but it is\nstill an out-of-bounds access KASAN correctly flags.\n\nFix by only checking buf[length - 1] when length is nonzero.",
  "id": "CVE-2026-81013",
  "modified": "2026-09-15T03:30:32.821991858Z",
  "published": "2026-09-11T19:43:02.741Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f9aad08424882dd5714b53d29ae044060890752"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21243c15e1d31f0df1517435e3a7784747f19043"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b2ec354f905c14e3270e8ec3ab50f7d8ad73bab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b699e5c1f63a9e79946c35598c8a6f7af2c356b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cecb8154bd5fa6c8ddbd1a4e8216bbc0f0eb9828"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81013.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81013"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "platform/x86: hp-bioscfg: fix heap OOB read on empty password write"
}