# CVE-2022-48793: linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: x86: nSVM: fix potential NULL derefernce on...

CVE-2022-48793 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48793, released July 16, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48793
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 16, 2024

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.11-1 | [DEBIAN-CVE-2022-48793](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48793.md) | Jul 16, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.11-1 | [DEBIAN-CVE-2022-48793](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48793.md) | Jul 16, 2024 |
| Linux | linux Debian 14 | 5.16.11-1 | [DEBIAN-CVE-2022-48793](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48793.md) | Jul 16, 2024 |

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