CVE-2021-26339: amd athlon™ series
Vulnerability summary
CVE-2021-26339 is a medium (CVSS 5.5) vulnerability in amd athlon™ series. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.1% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 40 · Related 40Timeline
- 11-05-2022PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
A bug in AMD CPU’s core logic may allow for an attacker, using specific code from an unprivileged VM, to trigger a CPU core hang resulting in a potential denial of service. AMD believes the specific code includes a specific x86 instruction sequence that would not be generated by compilers.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.28%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.28% 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.
Amd86 products
- athlon™ seriesvarious
- epyc_72f3_firmware< milanpi-sp3_1.0.0.7
- epyc_7313_firmware< milanpi-sp3_1.0.0.7
- epyc_7313p_firmware< milanpi-sp3_1.0.0.7
- epyc_7343_firmware< milanpi-sp3_1.0.0.7
1 vendor · 86 products