5.3
Medium
CVE-2023-4155 A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel
Description
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| kernel | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Fedora | Versions not published |
References
- access.redhat.com access.redhat.com
- RHBZ#2213802 bugzilla.redhat.com
Timeline
- Published
- Last modified
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