CVE-2021-26345: amd 2nd gen amd epyc™ processors Out-of-bounds Read
Vulnerability summary
CVE-2021-26345 is a medium (CVSS 4.9) Out-of-bounds Read vulnerability in amd 2nd gen amd epyc™ processors. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.7% of scored vulnerabilities.
Not severe (CVSS 1.9, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 8Timeline
- 14-11-2023PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Failure to validate the value in APCB may allow a privileged attacker to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.
CVSS metrics
2 scores · 2 sources · 1 version- CVE.orgCNA1.9LowCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:LDiffers
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.43% 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 causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Amd95 products
- 2nd gen amd epyc™ processorsvarious
- 3rd gen amd epyc™ processorsvarious
- 4th gen amd epyc™ processorsvarious
- amd epyc™ embedded 7002various
- amd epyc™ embedded 7003various
1 vendor · 95 products