{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.190-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.113-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.9-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  squashfs: Add dictionary size range check to prevent shift-out-of-bounds  When an abnormal SquashFS image (COMP_OPTS flag is 1 but dictionary size is 0) is mounted, and performs shift operations using dictionarysize, the shift exponent is -1, causing a shift-out-of-bounds.  Detail as below: squashfs_comp_opts(msblk, buffer, length)   squashfs_xz_comp_opts()     if (comp_opts)       n = ffs(opts-\u003edict_size) - 1;\u003c----opts-\u003edict_size=0, n=-1       if (opts-\u003edict_size != (1 \u003c\u003c n) \u0026\u0026 opts-\u003edict_size != \t  \t(1 \u003c\u003c n) + (1 \u003c\u003c (n + 1))) \u003c----shift-out-of-bounds  Fix it by adding a dictionary size range check before the shift operation.",
  "id": "DEBIAN-CVE-2026-98636",
  "modified": "2026-10-19T04:47:23.509325999Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98636"
    }
  ],
  "upstream": [
    "CVE-2026-98636"
  ]
}