{"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"}}}}

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{"bugzilla": {"description": "kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership()", "id": "2492097", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492097"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1024", "details": ["A flaw was found in the Linux kernel's `io_uring/poll` component. A logic error exists in the `io_poll_get_ownership()` function due to an incorrect signed comparison. This flaw prevents the necessary slowpath from being triggered when the `IO_POLL_CANCEL_FLAG` is set, potentially leading to unexpected behavior or resource mismanagement within the kernel."], "name": "CVE-2026-52933", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-52933\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52933\nhttps://lore.kernel.org/linux-cve-announce/2026062433-CVE-2026-52933-815c@gregkh/T"], "threat_severity": "Moderate"}

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