{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.3-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: SCO: hold sk properly in sco_conn_ready  sk deref in sco_conn_ready must be done either under conn-\u003elock, or holding a refcount, to avoid concurrent close. conn-\u003esk and parent sk is currently accessed without either, and without checking parent-\u003esk_state:      [Task 1]            [Task 2]                         sco_sock_release     sco_conn_ready       sk = conn-\u003esk                           lock_sock(sk)                             conn-\u003esk = NULL       lock_sock(sk)                           release_sock(sk)                           sco_sock_kill(sk)        UAF on sk deref  and similarly for access to sco_get_sock_listen() return value.  Fix possible UAF by holding sk refcount in sco_conn_ready() and making sco_get_sock_listen() increase refcount. Also recheck after lock_sock that the socket is still valid.  Adjust conn-\u003esk locking so it's protected also by lock_sock() of the associated socket if any.",
  "id": "DEBIAN-CVE-2026-89774",
  "modified": "2026-09-17T04:47:37.517668910Z",
  "published": "2026-09-16T09:17:07.717Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89774"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-89774"
  ]
}