CVE-2022-33740

Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).

• CWE-212

• https://www.openwall.com/lists/oss-security/2022/07/05/6Mailing List, Patch, Third Party Advisory
• https://xenbits.xen.org/xsa/advisory-403.htmlPatch, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
• https://www.debian.org/security/2022/dsa-5191Third Party Advisory
• https://xenbits.xenproject.org/xsa/advisory-403.txtVendor Advisory
• https://www.openwall.com/lists/oss-security/2022/07/05/6Mailing List, Patch, Third Party Advisory
• https://xenbits.xen.org/xsa/advisory-403.htmlPatch, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
• https://www.debian.org/security/2022/dsa-5191Third Party Advisory
• https://xenbits.xenproject.org/xsa/advisory-403.txtVendor Advisory

Published

Jul 5, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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