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CVE-2022-33906

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption…

Medium6.4EPSS 0.16%
Published
Updated
Reserved
Assigned by
mitre

Description

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler could cause SMRAM corruption through a TOCTOU attack. DMA transactions which are targeted at input buffers used for the software SMI handler used by the FwBlockServiceSmm driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in kernel 5.2: 05.27.23, 5.3: 05.36.23, 5.4: 05.44.23, 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022048

Scores

CVSS scores of CVE-2022-33906, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium6.4CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1Medium6.4CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.16% · top 95% 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: Medium 6.4.

Weakness

Affected products

  • n/a

    • affected n/a

References (3)

Sources

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

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Record last updated .