Tracker / CVE-2022-49556
CVE-2022-49556
High 7.1
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak For some sev ioctl interfaces, the length parameter that is passed maybe less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the allocated buffer, these sev ioctl interface may return uninitialized kernel slab memory.
Affected products and versions
| linux | linux_kernel · 5.11 → 5.15.45 |
|---|---|
| linux | linux_kernel · 5.16 → 5.17.13 |
| linux | linux_kernel · 5.18 → 5.18.2 |
| linux | linux_kernel · 5.7 → 5.10.124 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.