NULL Pointer Dereference Affecting perf package, versions <0:4.18.0-372.119.1.el8_6
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Test your applications- Snyk ID SNYK-RHEL8-PERF-7755256
- published 21 Aug 2024
- disclosed 16 Jul 2024
Introduced: 16 Jul 2024
CVE-2022-48793 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-372.119.1.el8_6 or higher.
This issue was patched in RHSA-2024:5692.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: nSVM: fix potential NULL derefernce on nested migration
Turns out that due to review feedback and/or rebases I accidentally moved the call to nested_svm_load_cr3 to be too early, before the NPT is enabled, which is very wrong to do.
KVM can't even access guest memory at that point as nested NPT is needed for that, and of course it won't initialize the walk_mmu, which is main issue the patch was addressing.
Fix this for real.