{
  "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-2026-52933",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-52933",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-24T07:14:24.678Z",
    "updatedAt": "2026-10-19T19:47:08.287Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "io_uring/poll: fix signed comparison in io_poll_get_ownership()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: fix signed comparison in io_poll_get_ownership()\n\nio_poll_get_ownership() uses a signed comparison to check whether\npoll_refs has reached the threshold for the slowpath:\n\n    if (unlikely(atomic_read(&req->poll_refs) >= IO_POLL_REF_BIAS))\n\natomic_read() returns int (signed). When IO_POLL_CANCEL_FLAG\n(BIT(31)) is set in poll_refs, the value becomes negative in\nsigned arithmetic, so the >= 128 comparison always evaluates to\nfalse and the slowpath is never taken.\n\nFix this by casting the atomic_read() result to unsigned int\nbefore the comparison, so that the cancel flag is treated as a\nlarge positive value and correctly triggers the slowpath.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "81bf96b0abbfa4cd47ea32e12596aed3855fb2f3"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cf522703d4f194991615763697ae25a3f9539763"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fc47043f3d9af3efa407665b47f8378ec691ba18"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea0697129807d718037f618221037aa0660ee3c5"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c6d191164dc81838d8dbf452a6000f68c558d1ae"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "326941b22806cbf2df1fbfe902b7908b368cce42"
            },
            {
              "version": "4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "bc4e6ee16778149811333a969a7a893d4cc110c5",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.15.82",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.16"
            },
            {
              "version": "6.0.11",
              "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": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.86",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.27",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}