CVE-2021-26342: amd epyc_7001_firmware
Vulnerability summary
CVE-2021-26342 is a low (CVSS 3.3) vulnerability in amd epyc_7001_firmware. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 13% of scored vulnerabilities.
Not severe (CVSS 3.3, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 11-05-2022PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.22% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Amd39 products
- epyc_7001_firmware< naplespi-sp3_1.0.0.h
- epyc_7251_firmware< naplespi-sp3_1.0.0.h
- epyc_7261_firmware< naplespi-sp3_1.0.0.h
- epyc_7281_firmware< naplespi-sp3_1.0.0.h
- epyc_72f3_firmware< milanpi-sp3_1.0.0.7
1 vendor · 39 products