{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "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:  btrfs: qgroup: fix a wrong length calculation in qgroup_free_reserved_data()  In that function, we round down the start position and round up the ending position.  But during the calculation of @len, we use \"round_up(start + len, sectorsize)\", which is the rounded up end position, not the rounded up length.  Which results a much larger length, and later we are still using \"start + len\", which is completely incorrect.  Fix it by declaring a local @aligned_start and @aligned_len and use them instead.",
  "id": "DEBIAN-CVE-2026-90259",
  "modified": "2026-09-23T03:47:37.466467043Z",
  "published": "2026-09-17T17:17:22.330Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-90259"
    }
  ],
  "upstream": [
    "CVE-2026-90259"
  ]
}