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).
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
https://www.debian.org/security/2022/dsa-5191
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
Source: MITRE
Published: 2022-07-05
Updated: 2022-10-29
Type: CWE-200
Base Score: 3.6
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P
Impact Score: 4.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 7.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Impact Score: 5.2
Exploitability Score: 1.8
Severity: HIGH