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CVE-2026-64284

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 flagge
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ce81469acd8e6ca6dba5dc89921f85392c6fcc8349841ded90c17552849504e3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c","arch/x86/kvm/vmx/vmx.c","arch/x86/kvm/x86.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b3436d9b9b1affe1c3191ac9831308923f5f03c3","status":"affected","version":"f7f39c50edb9d336274371953275e0d3503b9b75","versionType":"git"},{"lessThan":"4ad73ef0e7966ecfe67de0060537b4cb14d9acd4","status":"affected","version":"f7f39c50edb9d336274371953275e0d3503b9b75","versionType":"git"},{"lessThan":"f2ca2b5326211bd38490f0497eb583721ce0bbc0","status"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c","arch/x86/kvm/vmx/vmx.c","arch/x86/kvm/x86.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c","arch/x86/kvm/vmx/vmx.c","arch/x86/kvm/x86.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b3436d9b9b1affe1c3191ac9831308923f5f03c3","status":"affected","version":"f7f39c50edb9d336274371953275e0d3503b9b75","versionType":"git"},{"lessThan":"4ad73ef0e7966ecfe67de0060537b4cb14d9acd4","status":"affected","version":"f7f39c50edb9d336274371953275e0d3503b9b75","versionType":"git"},{"lessThan":"f2ca2b5326211bd38490f0497eb583721ce0bbc0","status"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c","arch/x86/kvm/vmx/vmx.c","arch/x86/kvm/x86.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/0ffedf43910e44b76c2c1db4e9fbf12b268190c1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/4ad73ef0e7966ecfe67de0060537b4cb14d9acd4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/b3436d9b9b1affe1c3191ac9831308923f5f03c3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/f2ca2b5326211bd38490f0497eb583721ce0bbc0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f3bae47ea5fbb1eab6d10e477484649af17cf84a30177c862b33359db6506e3a · sha256:813670fef6498dd2… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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