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CVE-2022-49883

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

High7.1EPSS 0.19%
Published
Updated
Reserved
Assigned by
Linux

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.

Scores

CVSS scores of CVE-2022-49883, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVDNVD · Modified3.1High7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS (exploitation in 30 days)
0.19% · top 92% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Weakness

Affected products

  • Linux · Linux

    • affected b443183a25ab61840a12de92f8822849e017b9c8 – < a7ebfbea0f52550d7cdf12c38f3f5eaa7b2b6494
    • affected b443183a25ab61840a12de92f8822849e017b9c8 – < 696db303e54f7352623d9f640e6c51d8fa9d5588

  • Linux · Linux

    • affected 6.0
    • unaffected < 6.0
    • unaffected 6.0.8 – ≤ 6.0.*
    • unaffected 6.1 – ≤ *

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .