{"api_version":"1","generated_at":"2026-06-25T03:17:08+00:00","cve":"CVE-2026-52933","urls":{"html":"https://cve.report/CVE-2026-52933","api":"https://cve.report/api/cve/CVE-2026-52933.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52933","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52933"},"summary":{"title":"io_uring/poll: fix signed comparison in io_poll_get_ownership()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:23","updated_at":"2026-06-24 08:16:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18","name":"https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","name":"https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5","name":"https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763","name":"https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae","name":"https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42","name":"https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52933","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52933","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea 81bf96b0abbfa4cd47ea32e12596aed3855fb2f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea cf522703d4f194991615763697ae25a3f9539763 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea fc47043f3d9af3efa407665b47f8378ec691ba18 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea ea0697129807d718037f618221037aa0660ee3c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea c6d191164dc81838d8dbf452a6000f68c558d1ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a26a35e9019fd70bf3cf647dcfdae87abc7bacea 326941b22806cbf2df1fbfe902b7908b368cce42 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bc4e6ee16778149811333a969a7a893d4cc110c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.82 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.0.11 6.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.140 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.86 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.27 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.4 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"52933","cve":"CVE-2026-52933","epss":"0.001610000","percentile":"0.055530000","score_date":"2026-06-24","updated_at":"2026-06-25 00:05:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["io_uring/poll.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"lessThan":"cf522703d4f194991615763697ae25a3f9539763","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"lessThan":"fc47043f3d9af3efa407665b47f8378ec691ba18","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"lessThan":"ea0697129807d718037f618221037aa0660ee3c5","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"lessThan":"c6d191164dc81838d8dbf452a6000f68c558d1ae","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"lessThan":"326941b22806cbf2df1fbfe902b7908b368cce42","status":"affected","version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","versionType":"git"},{"status":"affected","version":"4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048","versionType":"git"},{"status":"affected","version":"bc4e6ee16778149811333a969a7a893d4cc110c5","versionType":"git"},{"lessThan":"5.16","status":"affected","version":"5.15.82","versionType":"semver"},{"lessThan":"6.1","status":"affected","version":"6.0.11","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["io_uring/poll.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.1"},{"lessThan":"6.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.86","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.140","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.86","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.27","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.4","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.82","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:24.678Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3"},{"url":"https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763"},{"url":"https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18"},{"url":"https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5"},{"url":"https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae"},{"url":"https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42"}],"title":"io_uring/poll: fix signed comparison in io_poll_get_ownership()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52933","datePublished":"2026-06-24T07:14:24.678Z","dateReserved":"2026-06-09T07:44:35.369Z","dateUpdated":"2026-06-24T07:14:24.678Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:23","lastModifiedDate":"2026-06-24 08:16:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52933","Ordinal":"1","Title":"io_uring/poll: fix signed comparison in io_poll_get_ownership()","CVE":"CVE-2026-52933","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52933","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"io_uring/poll: fix signed comparison in io_poll_get_ownership()"}]}}}