CVE-2022-33740 Information

Description

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).

Reference

https://xenbits.xenproject.org/xsa/advisory-403.txt http://xenbits.xen.org/xsa/advisory-403.html http://www.openwall.com/lists/oss-security/2022/07/05/6