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).

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-33742
• https://xenbits.xenproject.org/xsa/advisory-403.txt
• http://www.openwall.com/lists/oss-security/2022/07/05/6
• http://xenbits.xen.org/xsa/advisory-403.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
• https://www.debian.org/security/2022/dsa-5191
• https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html