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CVE-2021-26342

UNKNOWN
Published 2022-05-11T16:21:04.403325Z
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No CVSS data available

Description

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

AMD

EPYC™ Processors

Affected Versions:

various

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed LOW

GHSA-wp53-p3r5-cq4w

Advisory Details

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

CVSS Scoring

CVSS Score

2.5

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-26342
WEB https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

Advisory provided by GitHub Security Advisory Database. Published: May 12, 2022, Modified: May 20, 2022

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028
Published: 2022-05-11T16:21:04.403325Z
Last Modified: 2024-09-16T16:32:42.078Z
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