CVE-2023-4155
published 2023-09-13CVE-2023-4155: A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a…
medium5.6CVSS 3.1
AVLACHPRLUINSCCNINAH
A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.52-1 (bookworm) | linux 6.1.52-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| linux | linux_kernel | >= 0 < 6.1.52-1 | 6.1.52-1 |
| linux | linux_kernel | >= 0 < 6.4.11-1 | 6.4.11-1 |
| linux | linux_kernel | >= 0 < 6.4.11-1 | 6.4.11-1 |
| linux | linux_kernel | >= 0 < 5.15.0-86.96 | 5.15.0-86.96 |
| msrc | cbl2_hyperv-daemons_5.15.158.1-1_on_cbl_mariner_2.0 | — | — |
| paloalto | pan-os | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
| ubuntu | linux-intel-iotg-5.15 | — | — |
CVSS provenance
nvdv3.15.6MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
osv7.0HIGH