{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52933","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.369Z","datePublished":"2026-06-24T07:14:24.678Z","dateUpdated":"2026-06-28T06:36:54.123Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:36:54.123Z"},"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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"],"versions":[{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"81bf96b0abbfa4cd47ea32e12596aed3855fb2f3","status":"affected","versionType":"git"},{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"cf522703d4f194991615763697ae25a3f9539763","status":"affected","versionType":"git"},{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"fc47043f3d9af3efa407665b47f8378ec691ba18","status":"affected","versionType":"git"},{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"ea0697129807d718037f618221037aa0660ee3c5","status":"affected","versionType":"git"},{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"c6d191164dc81838d8dbf452a6000f68c558d1ae","status":"affected","versionType":"git"},{"version":"a26a35e9019fd70bf3cf647dcfdae87abc7bacea","lessThan":"326941b22806cbf2df1fbfe902b7908b368cce42","status":"affected","versionType":"git"},{"version":"4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048","status":"affected","versionType":"git"},{"version":"bc4e6ee16778149811333a969a7a893d4cc110c5","status":"affected","versionType":"git"},{"version":"5.15.82","lessThan":"5.16","status":"affected","versionType":"semver"},{"version":"6.0.11","lessThan":"6.1","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["io_uring/poll.c"],"versions":[{"version":"6.1","status":"affected"},{"version":"0","lessThan":"6.1","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.140","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.86","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.27","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.4","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"7.1"},{"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"}]}]}],"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"}}}}