vulnerability
Debian: CVE-2023-4155: linux -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:M/Au:S/C:N/I:N/A:C) | Sep 13, 2023 | Oct 19, 2023 | Jan 28, 2025 |
Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
Sep 13, 2023
Added
Oct 19, 2023
Modified
Jan 28, 2025
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`).
Solution
debian-upgrade-linux
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