CVE-2022-26365 Information disclosure in Linux
Linux kernel frontends fail to zero memory before sharing with backends, allowing malicious backends to read unrelated sensitive data from the same memory page.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-26365?
CVE-2022-26365 is a high-severity vulnerability in Debian Debian Linux, published on 5 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-401
Which versions are affected by CVE-2022-26365?
It affects 4 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Xen Xen.
How do I fix CVE-2022-26365?
Apply the vendor's patch.
Is CVE-2022-26365 being exploited?
There is no known exploitation of CVE-2022-26365 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2022-26365, DEBIAN-CVE-2022-26365, GHSA-637x-cm53-gcgj, UBUNTU-CVE-2022-26365.