CVE-2022-33740

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).

How to fix CVE-2022-33740

To remediate CVE-2022-33740, upgrade the affected package to a fixed version below.

• —upgrade to 4.14.5-r3 or later
• —upgrade to 5.10.127-2 or later
• —no fix listed

Is CVE-2022-33740 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• from 0, < 4.14.5-r3
• from 0, < 5.10.127-2
• from 0

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-33740
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-33740