{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","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","source":"CNA: Linux","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"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.7","versionType":"custom"}]}],"cveId":"CVE-2026-52933","cwes":["CWE-190"],"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.","epss":{"date":"2026-11-09","percentile":0.04012,"score":0.00148},"exploits":[],"kev":null,"metrics":[{"score":7.8,"severity":"high","source":"CNA: Linux","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794314865169,"publishedAt":1782285264678,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"remediation":[],"revision":"927c1ac76a9580adf95e49fc0ad40b24a9b9b3edc08a09ea4de5107051ad68f3","sources":[{"modifiedAt":1794314865169,"name":"CNA: Linux","retrievedAt":1794316670116,"url":"https://www.cve.org/CVERecord?id=CVE-2026-52933"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794316684109,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-52933"}],"ssvc":{"assessedAt":1792164178731,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"io_uring/poll: fix signed comparison in io_poll_get_ownership()","updatedAt":1794316684109}