Out-of-bounds Read Affecting kernel-debug-modules package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-4267023
- published 11 Dec 2021
- disclosed 22 Nov 2021
How to fix?
Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RHSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.