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CVE-2026-64309

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

In 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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 1c3506ea8599a3ad1b9aae5cbd573134f8d18db7
Version < 74768f73854d647a6462f252dc8782ab8a835211
Status affected
Version ceac7fb89e8da465aec3ac3c20477f912f5c3a6c
Version < 7a361c74bb12f3398c388905f1d325be642cd36e
Status affected
Version ceac7fb89e8da465aec3ac3c20477f912f5c3a6c
Version < 67ed191b4c8bdf432a3f32d1eb302880b4795cd1
Status affected
Version ceac7fb89e8da465aec3ac3c20477f912f5c3a6c
Version < 5a1364da2f04217a36e2fdfa2db4ee025b383a20
Status affected
Version 6.12.75
Version < 6.12.96
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.16
Status affected
Version 0
Version < 6.16
Status unaffected
Version <= 6.12.*
Version 6.12.96
Status unaffected
Version <= 6.18.*
Version 6.18.39
Status unaffected
Version <= 7.1.*
Version 7.1.4
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.121
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/74768f73854d647a6462f252dc8782ab8a835211
https://git.kernel.org/stable/c/7a361c74bb12f3398c388905f1d325be642cd36e
https://git.kernel.org/stable/c/67ed191b4c8bdf432a3f32d1eb302880b4795cd1
https://git.kernel.org/stable/c/5a1364da2f04217a36e2fdfa2db4ee025b383a20