{
  "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-2023-53815",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53815",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-09T00:01:12.832Z",
    "updatedAt": "2026-05-11T19:52:03.416Z",
    "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": "posix-timers: Prevent RT livelock in itimer_delete()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-timers: Prevent RT livelock in itimer_delete()\n\nitimer_delete() has a retry loop when the timer is concurrently expired. On\nnon-RT kernels this just spin-waits until the timer callback has completed,\nexcept for posix CPU timers which have HAVE_POSIX_CPU_TIMERS_TASK_WORK\nenabled.\n\nIn that case and on RT kernels the existing task could live lock when\npreempting the task which does the timer delivery.\n\nReplace spin_unlock() with an invocation of timer_wait_running() to handle\nit the same way as the other retry loops in the posix timer code.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f1be1ed32daa053484222f7f9beb2b16c624dffd"
            },
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0670c4c567b27bd8f999a943028f4fe60d1a1106"
            },
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e7aff15ba29ba4b3052786b1636fa5c4aa39e179"
            },
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f9bd298e3e4d3fd6e19f017789a42d0f332cd555"
            },
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c1968bb8a28625cc95d2ad3ca872ab98c9c36d59"
            },
            {
              "version": "ec8f954a40da8cd3d159713b608e901f0cd909a9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9d9e522010eb5685d8b53e8a24320653d9d4cbbf"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.4"
            },
            {
              "version": "5.10.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.39",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.3.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "version": "6.4.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "version": "6.5",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}