CVE-2022-33741: Debian Linux

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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).

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 35 only; version 36 only
• Linux Linux Kernel: from 2.6.13, before 4.9.322 (fixed in 4.9.322); from 4.14, before 4.14.287 (fixed in 4.14.287); from 4.19, before 4.19.251 (fixed in 4.19.251); from 5.4, before 5.4.204 (fixed in 5.4.204); from 5.10, before 5.10.129 (fixed in 5.10.129); from 5.15, before 5.15.53 (fixed in 5.15.53); …
• Xen Xen: affected versions not specified

Published 2022-07-05. Last modified 2026-06-17.