Time-of-check Time-of-use (TOCTOU) Affecting kernel-devel-matched package, versions <0:5.14.0-362.8.1.el9_3
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Test your applications- Snyk ID SNYK-ORACLE9-KERNELDEVELMATCHED-6066870
- published 17 Nov 2023
- disclosed 13 Sep 2023
Introduced: 13 Sep 2023
CVE-2023-4155 Open this link in a new tabHow to fix?
Upgrade Oracle:9 kernel-devel-matched to version 0:5.14.0-362.8.1.el9_3 or higher.
This issue was patched in ELSA-2023-6583.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-devel-matched package and not the kernel-devel-matched package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
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).