{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.170-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.85-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.18.14-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  procfs: fix missing RCU protection when reading real_parent in do_task_stat()  When reading /proc/[pid]/stat, do_task_stat() accesses task-\u003ereal_parent without proper RCU protection, which leads to:    cpu 0                               cpu 1   -----                               -----   do_task_stat     var = task-\u003ereal_parent                                       release_task                                         call_rcu(delayed_put_task_struct)     task_tgid_nr_ns(var)       rcu_read_lock   \u003c--- Too late to protect task-\u003ereal_parent!       task_pid_ptr    \u003c--- UAF!       rcu_read_unlock  This patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add proper RCU protection for accessing task-\u003ereal_parent.",
  "id": "DEBIAN-CVE-2026-46259",
  "modified": "2026-09-14T16:47:39.157244398Z",
  "published": "2026-06-03T18:16:26.987Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-46259"
    }
  ],
  "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-2026-46259"
  ]
}