CVE-2022-49883

KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format

Description

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.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/a7ebfbea0f52550d7cdf12c38f3f5eaa7b2b6494
https://git.kernel.org/stable/c/696db303e54f7352623d9f640e6c51d8fa9d5588

Frequently Asked Questions

What is the severity of CVE-2022-49883?: CVE-2022-49883 has not yet been assigned a CVSS score.
How to fix CVE-2022-49883?: To fix CVE-2022-49883, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49883 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49883 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49883?: CVE-2022-49883 affects Linux Linux, Linux Linux.

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