{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap  statmount_mnt_idmap() writes one mapping with seq_printf() and then manually advances seq-\u003ecount to include the NUL separator.  If seq_printf() overflows, seq_set_overflow() sets seq-\u003ecount to seq-\u003esize. The manual seq-\u003ecount++ changes this to seq-\u003esize + 1. seq_has_overflowed() then no longer detects the overflow. The corrupted count returns to statmount_string(), which later executes:      seq-\u003ebuf[seq-\u003ecount++] = '\\0';  This causes a 1-byte NULL out-of-bounds write on the dynamically allocated seq buffer.  Fix this by checking for overflow immediately after seq_printf().",
  "id": "DEBIAN-CVE-2026-64074",
  "modified": "2026-09-14T16:47:44.768123140Z",
  "published": "2026-07-19T16:17:48.010Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64074"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64074"
  ]
}