Vulnerability · Published May 11, 2022 · Assigned by AMD
CVE-2021-26342
Low 3.3
In plain English
A low-severity security flaw in EPYC™ Processors from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS NVD)3.3Low
Exploit odds (30 days)0.2%top 87.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | EPYC™ Processors | various |