CVE-2022-49883
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format
On 64 bit host, if the guest doesn't have X86_FEATURE_LM, KVM will access 16 gprs to 32-bit smram image, causing out-ouf-bound ram access.
On 32 bit host, the rsm_load_state_64/enter_smm_save_state_64 is compiled out, thus access overflow can't happen.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 6.0 | 6.0.8 |
| linux / linux_kernel | 6.1-rc1 | 6.1-rc1.x |
| linux / linux_kernel | 6.1-rc2 | 6.1-rc2.x |
| linux / linux_kernel | 6.1-rc3 | 6.1-rc3.x |
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