CVE-2022-33745 Other in xen

What is CVE-2022-33745?

CVE-2022-33745 is a high-severity vulnerability in Debian Debian Linux, published on 26 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.

Which versions are affected by CVE-2022-33745?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Xen Xen.

How do I fix CVE-2022-33745?

Apply the vendor's patch.

Is CVE-2022-33745 being exploited?

There is no known exploitation of CVE-2022-33745 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-33745, DEBIAN-CVE-2022-33745, GHSA-f5vc-gmmj-gpp6, UBUNTU-CVE-2022-33745.