{
  "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-2024-43869",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-43869",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-08-21T00:06:20.807Z",
    "updatedAt": "2026-05-23T15:53:03.625Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "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": "perf: Fix event leak upon exec and file release",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix event leak upon exec and file release\n\nThe perf pending task work is never waited upon the matching event\nrelease. In the case of a child event, released via free_event()\ndirectly, this can potentially result in a leaked event, such as in the\nfollowing scenario that doesn't even require a weak IRQ work\nimplementation to trigger:\n\nschedule()\n   prepare_task_switch()\n=======> <NMI>\n      perf_event_overflow()\n         event->pending_sigtrap = ...\n         irq_work_queue(&event->pending_irq)\n<======= </NMI>\n      perf_event_task_sched_out()\n          event_sched_out()\n              event->pending_sigtrap = 0;\n              atomic_long_inc_not_zero(&event->refcount)\n              task_work_add(&event->pending_task)\n   finish_lock_switch()\n=======> <IRQ>\n   perf_pending_irq()\n      //do nothing, rely on pending task work\n<======= </IRQ>\n\nbegin_new_exec()\n   perf_event_exit_task()\n      perf_event_exit_event()\n         // If is child event\n         free_event()\n            WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1)\n            // event is leaked\n\nSimilar scenarios can also happen with perf_event_remove_on_exec() or\nsimply against concurrent perf_event_release().\n\nFix this with synchonizing against the possibly remaining pending task\nwork while freeing the event, just like is done with remaining pending\nIRQ work. This means that the pending task callback neither need nor\nshould hold a reference to the event, preventing it from ever beeing\nfreed.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8bffa95ac19ff27c8261904f89d36c7fcf215d59",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9ad46f1fef421d43cdab3a7d1744b2f43b54dae0"
            },
            {
              "version": "517e6a301f34613bff24a8e35b5455884f2d83d8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ed2c202dac55423a52d7e2290f2888bf08b8ee99"
            },
            {
              "version": "517e6a301f34613bff24a8e35b5455884f2d83d8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "104e258a004037bc7dba9f6085c71dad6af57ad4"
            },
            {
              "version": "517e6a301f34613bff24a8e35b5455884f2d83d8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f34d8307a73a18de5320fcc6f40403146d061891"
            },
            {
              "version": "517e6a301f34613bff24a8e35b5455884f2d83d8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3a5465418f5fd970e86a86c7f4075be262682840"
            },
            {
              "version": "78e1317a174edbfd1182599bf76c092a2877672c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.84",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.165"
            },
            {
              "version": "6.0.14",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.1"
            },
            {
              "version": "5.15.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.103",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.44",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.10.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.10.*"
            },
            {
              "version": "6.11",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}