CVE-2022-33983
First published: Mon Nov 14 2022(Updated: )
DMA transactions which are targeted at input buffers used for the NvmExpressLegacy 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 NvmExpressLegacy 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. This issue was fixed in kernel 5.2: 05.27.25, kernel 5.3: 05.36.25, kernel 5.4: 05.44.25, kernel 5.5: 05.52.25 https://www.insyde.com/security-pledge/SA-2022053
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Insyde Kernel | >=5.2<5.2.05.27.25 | |
| Insyde Kernel | >=5.3<5.3.05.36.25 | |
| Insyde Kernel | >=5.4<5.4.05.44.25 | |
| Insyde Kernel | >=5.5<5.5.05.52.25 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-33983?
CVE-2022-33983 is a vulnerability that could cause SMRAM corruption through a TOCTOU attack in the NvmExpressLegacy software SMI handler.
How does CVE-2022-33983 affect the Insyde Kernel?
CVE-2022-33983 affects the Insyde Kernel versions 5.2 to 5.5, potentially allowing DMA transactions to corrupt SMRAM through a TOCTOU attack in the NvmExpressLegacy software SMI handler.
What is the severity level of CVE-2022-33983?
CVE-2022-33983 has a severity level of high (7).
What is a TOCTOU attack?
A TOCTOU (Time-of-check to time-of-use) attack is a vulnerability that occurs when there is a race condition between the check and use of a resource, potentially leading to exploitation of this time window to perform unauthorized actions.
How can I mitigate the risks of CVE-2022-33983?
To mitigate the risks of CVE-2022-33983, it is recommended to apply the latest updates and patches provided by Insyde for the Insyde Kernel.
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