{"api_version":"1","generated_at":"2026-04-23T02:18:34+00:00","cve":"CVE-2021-33200","urls":{"html":"https://cve.report/CVE-2021-33200","api":"https://cve.report/api/cve/CVE-2021-33200.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-33200","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33200"},"summary":{"title":"CVE-2021-33200","description":"kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-05-27 13:15:00","updated_at":"2023-11-07 03:35:00"},"problem_types":["CWE-787"],"metrics":[],"references":[{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/","name":"FEDORA-2021-646098b5b8","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: kernel-5.12.8-300.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4/","name":"FEDORA-2021-0b35886add","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: kernel-5.12.8-200.fc33 - package-announce - Fedora 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limits for pointer\n arithmetic operations by BPF verifier can be abused to perform out-of-bounds\n reads and writes in kernel memory","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/","name":"FEDORA-2021-646098b5b8","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: kernel-5.12.8-300.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33200","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33200","name":"NVD vulnerability 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This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://www.openwall.com/lists/oss-security/2021/05/27/1","url":"https://www.openwall.com/lists/oss-security/2021/05/27/1"},{"refsource":"FEDORA","name":"FEDORA-2021-0b35886add","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4/"},{"refsource":"FEDORA","name":"FEDORA-2021-646098b5b8","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/"},{"refsource":"CONFIRM","name":"https://security.netapp.com/advisory/ntap-20210706-0004/","url":"https://security.netapp.com/advisory/ntap-20210706-0004/"}]}},"nvd":{"publishedDate":"2021-05-27 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in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"33200","Ordinal":"2","NoteData":"2021-05-27","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"33200","Ordinal":"3","NoteData":"2021-07-06","Type":"Other","Title":"Modified"}]}}}