crypto: ccp - Do not initialize SNP for ioctl(SNP_COMMIT)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64309
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:12 UTC
Updated2026-07-25 10:17:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Do not initialize SNP for ioctl(SNP_COMMIT) Sashiko notes: > if SEV initialization fails and KVM is actively running normal VMs, could a > userspace process trigger this code path via /dev/sev ioctls (e.g., > SEV_PDH_GEN) and zero out MSR_VM_HSAVE_PA globally? Would the next VMRUN > execution for an active VM trigger a general protection fault and crash the > host? The SNP_COMMIT command does not require the firmware to be in any particular state. Skip initializing it if it was previously uninitialized. The SEV-SNP firmware specification doc 56860 does not mention SNP_COMMIT in Table 5 as a command that is allowed in the UNINIT state, but it is in fact allowed and a future documentation update will reflect that.

Risk And Classification

EPSS: 0.002250000 probability, percentile 0.132610000 (date 2026-07-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1c3506ea8599a3ad1b9aae5cbd573134f8d18db7 74768f73854d647a6462f252dc8782ab8a835211 git Not specified
CNA Linux Linux affected ceac7fb89e8da465aec3ac3c20477f912f5c3a6c 7a361c74bb12f3398c388905f1d325be642cd36e git Not specified
CNA Linux Linux affected ceac7fb89e8da465aec3ac3c20477f912f5c3a6c 67ed191b4c8bdf432a3f32d1eb302880b4795cd1 git Not specified
CNA Linux Linux affected ceac7fb89e8da465aec3ac3c20477f912f5c3a6c 5a1364da2f04217a36e2fdfa2db4ee025b383a20 git Not specified
CNA Linux Linux affected 6.12.75 6.12.96 semver Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/74768f73854d647a6462f252dc8782ab8a835211 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/67ed191b4c8bdf432a3f32d1eb302880b4795cd1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5a1364da2f04217a36e2fdfa2db4ee025b383a20 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7a361c74bb12f3398c388905f1d325be642cd36e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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