CVE-2026-64284
CVE CVE-2026-64284EUVD EUVD-2026-48996Published 2026-07-25T08:49:26.000ZLast changed 2026-08-05T12:40:33.000ZCVSS 7.1
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains control of the vCPU. E.g. for VMX (and soon to be for SVM as well), KVM needs to flush the PML buffer prior to exiting to userspace, otherwise any memory written by the final KVM_RUN might never be flagged as dirty. Note, waiting to snapshot CR0 and CR3 until svm_handle_exit() is flawed in general, as that risks consuming stale state in a fastpath handler. That will be addressed in a future change.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux f7f39c50edb9d336274371953275e0d3503b9b75 <0ffedf43910e44b76c2c1db4e9fbf12b268190c1; f7f39c50edb9d336274371953275e0d3503b9b75 <f2ca2b5326211bd38490f0497eb583721ce0bbc0; f7f39c50edb9d336274371953275e0d3503b9b75 <4ad73ef0e7966ecfe67de0060537b4cb14d9acd4; f7f39c50edb9d336274371953275e0d3503b9b75 <b3436d9b9b1affe1c3191ac9831308923f5f03c3; patch: 7.1.4; patch: 7.2-rc1; patch: 6.18.39; 6.12; patch: 0; patch: 6.12.96
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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