{"cve":{"cve_id":"CVE-2026-52933","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"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.","published_at":"2026-06-24T07:14:24.678000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763","https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18","https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5","https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae","https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:22.518073Z","updated_at":"2026-06-28T23:30:49.890169Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:81bf96b0abbfa4cd47ea32e12596aed3855fb2f3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"cf522703d4f194991615763697ae25a3f9539763","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:cf522703d4f194991615763697ae25a3f9539763"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"fc47043f3d9af3efa407665b47f8378ec691ba18","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:fc47043f3d9af3efa407665b47f8378ec691ba18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"ea0697129807d718037f618221037aa0660ee3c5","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:ea0697129807d718037f618221037aa0660ee3c5"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"c6d191164dc81838d8dbf452a6000f68c558d1ae","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:c6d191164dc81838d8dbf452a6000f68c558d1ae"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","version_start_inclusive":true,"version_end":"326941b22806cbf2df1fbfe902b7908b368cce42","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a26a35e9019fd70bf3cf647dcfdae87abc7bacea:326941b22806cbf2df1fbfe902b7908b368cce42"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048","version_start_inclusive":true,"version_end":"4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048:4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"bc4e6ee16778149811333a969a7a893d4cc110c5","version_start_inclusive":true,"version_end":"bc4e6ee16778149811333a969a7a893d4cc110c5","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:bc4e6ee16778149811333a969a7a893d4cc110c5:bc4e6ee16778149811333a969a7a893d4cc110c5"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.82","version_start_inclusive":true,"version_end":"5.16","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:5.15.82:5.16"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.0.11","version_start_inclusive":true,"version_end":"6.1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.0.11:6.1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1","version_start_inclusive":true,"version_end":"6.1","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1:6.1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.140","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.140:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.86","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.86:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.27","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.27:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.4","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.4:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T07:14:24.678000Z","label":"CVE published","source":null}]}