CVE-2022-48793
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…
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfePatch
- https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6Patch
- https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943dfPatch
- https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfePatch
- https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6Patch
- https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943dfPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.