{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-53419",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53419",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-18T16:04:02.955Z",
    "updatedAt": "2026-05-11T19:44:36.756Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Protect rcu_print_task_exp_stall() ->exp_tasks access\n\nFor kernels built with CONFIG_PREEMPT_RCU=y, the following scenario can\nresult in a NULL-pointer dereference:\n\n           CPU1                                           CPU2\nrcu_preempt_deferred_qs_irqrestore                rcu_print_task_exp_stall\n  if (special.b.blocked)                            READ_ONCE(rnp->exp_tasks) != NULL\n    raw_spin_lock_rcu_node\n    np = rcu_next_node_entry(t, rnp)\n    if (&t->rcu_node_entry == rnp->exp_tasks)\n      WRITE_ONCE(rnp->exp_tasks, np)\n      ....\n      raw_spin_unlock_irqrestore_rcu_node\n                                                    raw_spin_lock_irqsave_rcu_node\n                                                    t = list_entry(rnp->exp_tasks->prev,\n                                                        struct task_struct, rcu_node_entry)\n                                                    (if rnp->exp_tasks is NULL, this\n                                                       will dereference a NULL pointer)\n\nThe problem is that CPU2 accesses the rcu_node structure's->exp_tasks\nfield without holding the rcu_node structure's ->lock and CPU2 did\nnot observe CPU1's change to rcu_node structure's ->exp_tasks in time.\nTherefore, if CPU1 sets rcu_node structure's->exp_tasks pointer to NULL,\nthen CPU2 might dereference that NULL pointer.\n\nThis commit therefore holds the rcu_node structure's ->lock while\naccessing that structure's->exp_tasks field.\n\n[ paulmck: Apply Frederic Weisbecker feedback. ]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "314eeb43e5f22856b281c91c966e51e5782a3498",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a7d21b8585894e6fff973f6ddae42f02b13f600f"
            },
            {
              "version": "314eeb43e5f22856b281c91c966e51e5782a3498",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e30a55e98ae6c44253d8b129efefd5da5bc6e3bc"
            },
            {
              "version": "314eeb43e5f22856b281c91c966e51e5782a3498",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d0a8c0e31a09ec1efd53079083e2a677956b4d91"
            },
            {
              "version": "314eeb43e5f22856b281c91c966e51e5782a3498",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2bc0ae94ef1f9ed322d8ee439de3239ea3632ab2"
            },
            {
              "version": "314eeb43e5f22856b281c91c966e51e5782a3498",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c1566bca3f8349f12b75d0a2d5e4a20ad6262ec"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.10.181",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.113",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.3.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "version": "6.4",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}