CVE-2022-33742: Infoleak
Last updated 25 April 2025
Other sources
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).
— Launchpad
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2022-33742?
CVE-2022-33742 has been classified as a medium severity vulnerability due to the potential for unauthorized memory access.
How do I fix CVE-2022-33742?
To mitigate CVE-2022-33742, it's recommended to update to the latest patched versions of the affected Linux distributions or kernels.
Which versions of Linux are affected by CVE-2022-33742?
CVE-2022-33742 affects multiple versions of the Linux kernel, including 2.6.12-rc2 to 5.19-rc5 and specific distributions like Fedora 35 and 36, and Debian 10.0 and 11.0.
What types of systems are impacted by CVE-2022-33742?
Systems using Linux Block and Network PV device frontends are impacted by CVE-2022-33742, which may leak sensitive data.
Is CVE-2022-33742 remotely exploitable?
CVE-2022-33742 is considered to have potential for local exploitation, but it could lead to data leaks under specific circumstances.