{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:11",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.191-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.37-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.3.7-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.3.7-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  rcu: Protect rcu_print_task_exp_stall() -\u003eexp_tasks access  For kernels built with CONFIG_PREEMPT_RCU=y, the following scenario can result in a NULL-pointer dereference:             CPU1                                           CPU2 rcu_preempt_deferred_qs_irqrestore                rcu_print_task_exp_stall   if (special.b.blocked)                            READ_ONCE(rnp-\u003eexp_tasks) != NULL     raw_spin_lock_rcu_node     np = rcu_next_node_entry(t, rnp)     if (\u0026t-\u003ercu_node_entry == rnp-\u003eexp_tasks)       WRITE_ONCE(rnp-\u003eexp_tasks, np)       ....       raw_spin_unlock_irqrestore_rcu_node                                                     raw_spin_lock_irqsave_rcu_node                                                     t = list_entry(rnp-\u003eexp_tasks-\u003eprev,                                                         struct task_struct, rcu_node_entry)                                                     (if rnp-\u003eexp_tasks is NULL, this                                                        will dereference a NULL pointer)  The problem is that CPU2 accesses the rcu_node structure's-\u003eexp_tasks field without holding the rcu_node structure's -\u003elock and CPU2 did not observe CPU1's change to rcu_node structure's -\u003eexp_tasks in time. Therefore, if CPU1 sets rcu_node structure's-\u003eexp_tasks pointer to NULL, then CPU2 might dereference that NULL pointer.  This commit therefore holds the rcu_node structure's -\u003elock while accessing that structure's-\u003eexp_tasks field.  [ paulmck: Apply Frederic Weisbecker feedback. ]",
  "id": "DEBIAN-CVE-2023-53419",
  "modified": "2026-04-28T19:53:23.248991226Z",
  "published": "2025-09-18T16:15:45.650Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2023-53419"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2023-53419"
  ]
}