CVE-2024-46707

Summary

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Make ICC_SGI_EL1 undef in the absence of a vGICv3

On a system with a GICv3, if a guest hasn't been configured with GICv3 and that the host is not capable of GICv2 emulation, a write to any of the ICC_SGI_EL1 registers is trapped to EL2.

We therefore try to emulate the SGI access, only to hit a NULL pointer as no private interrupt is allocated (no GIC, remember?).

The obvious fix is to give the guest what it deserves, in the shape of a UNDEF exception.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 15818af2f7aa55eff375333cb7689df15d3f24efaffected
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 96b076e8ee5bc3a1126848c8add0f74bd30dc9d1affected
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 94d4fbad01b19ec5eab3d6b50aaec4f9db8b2d8daffected
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 9d7629bec5c3f80bd0e3bf8103c06a2f7046bd92affected
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 2073132f6ed3079369e857a8deb33d11bdd983bcaffected
LinuxLinux6211753fdfd05af9e08f54c8d0ba3ee516034878 < 3e6245ebe7ef341639e9a7e402b3ade8ad45a19faffected
LinuxLinux3.11affected
LinuxLinux0 < 3.11unaffected
LinuxLinux5.10.225 <= 5.10.*unaffected
LinuxLinux5.15.166 <= 5.15.*unaffected
LinuxLinux6.1.107 <= 6.1.*unaffected
LinuxLinux6.6.48 <= 6.6.*unaffected
LinuxLinux6.10.7 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References