CVE-2022-33740

Public on 2022-07-05
Modified on 2022-10-25
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).

Severity
Important
See what this means
CVSS v3 Base Score
7.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2022-07-28 20:37 ALAS-2022-1624
Amazon Linux 2 - Core kernel 2022-07-19 01:20 ALAS2-2022-1825
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-07-19 16:01 ALAS2KERNEL-5.10-2022-018
Amazon Linux 2 - Kernel-5.15 Extra kernel 2022-07-19 16:02 ALAS2KERNEL-5.15-2022-005
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-07-19 16:02 ALAS2KERNEL-5.4-2022-033
Amazon Linux 2023 kernel 2023-02-17 20:46 ALAS2023-2023-070

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 3.6 AV:L/AC:L/Au:N/C:P/I:N/A:P
Amazon Linux CVSSv3 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD CVSSv2 3.6 AV:L/AC:L/Au:N/C:P/I:N/A:P
NVD CVSSv3 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H