{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  platform/x86: hp-bioscfg: fix heap OOB read on empty password write  validate_password_input() computes length = strlen(buf) and then checks buf[length - 1] to strip a trailing newline, without checking that length is nonzero first. Writing an empty string (a bare '\\n') to current_password or new_password gives length == 0, and buf[length - 1] reads buf[-1], one byte before the heap allocation holding the copied input.  KASAN confirms this directly:    BUG: KASAN: slab-out-of-bounds in store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]   Read of size 1 at addr ffff88811bd8da9f by task sh/13740   ...   store_password_instance.constprop.0+0x223/0x2a0 [hp_bioscfg]   current_password_store+0x14/0x20 [hp_bioscfg]   ...   The buggy address is located 23 bytes to the right of   allocated 8-byte region [ffff88811bd8da80, ffff88811bd8da88)  Reproduced identically via new_password_store. Execution continues past the bad read (the garbage byte only affects whether \"length\" is decremented by one), so the write completes and returns success; this is a pure information read past the buffer, not a crash, but it is still an out-of-bounds access KASAN correctly flags.  Fix by only checking buf[length - 1] when length is nonzero.",
  "id": "DEBIAN-CVE-2026-81013",
  "modified": "2026-09-23T03:47:37.094435718Z",
  "published": "2026-09-11T20:19:10.173Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-81013"
    }
  ],
  "upstream": [
    "CVE-2026-81013"
  ]
}