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CVE record · CVE-2021-26383

Out-of-bounds write in AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics and others

CVSS 7.9 HighEPSS 0.0017 · 6th percentile

Published by the CVE Program (CNA: AMD) at 5 Sept 2025, 23:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics
  • unaffected CezannePI-FP6 1.0.0.6
Other versions: affected
AMD AMD Ryzen™ 4000 Series Desktop Processors
  • unaffected ComboAM4v2 PI 1.2.0.5
Other versions: affected
AMD AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics
  • unaffected CezannePI-FP6 1.0.0.6
Other versions: affected
AMD AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics
  • unaffected ComboAM4v2 PI 1.2.0.5
Other versions: affected
AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics
  • unaffected RenoirPI-FP6 1.0.0.7
Other versions: affected
AMD AMD Ryzen™ Embedded V2000 Series Processors
  • unaffected EmbeddedPI-FP6_1.0.0.6
Other versions: affected
AMD AMD Radeon™ RX 5000 Series Graphics Products
  • unaffected AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)
Other versions: affected
AMD AMD Radeon™ RX 6000 Series Graphics Products
  • unaffected AMD Software: Adrenalin Edition 23.2.1 (22.40.01.45)
Other versions: affected
AMD AMD Radeon™ PRO W5000 Series Graphics Products
  • unaffected AMD Software: PRO Edition 23.Q1 (22.40.37.05)
Other versions: affected
AMD AMD Radeon™ PRO W6000 Series Graphics Products
  • unaffected AMD Software: PRO Edition 23.Q1 (22.40.37.05)
Other versions: affected
AMD AMD Instinct™ MI210
  • unaffected ROCm 6.4
Other versions: affected
AMD AMD Instinct™ MI250
  • unaffected ROCm 6.4
Other versions: affected
AMD AMD Radeon™ PRO V520 Graphics Products
  • unaffected Contact your AMD Customer Engineering representative
Other versions: affected
AMD AMD Radeon™ PRO V620 Graphics Products
  • unaffected Contact your AMD Customer Engineering representative
Other versions: affected
Identifiers
CVE-2021-26383
CNA
AMD
Weakness (CWE)
CWE-787
Tags
Published
5 Sept 2025
Updated
8 Sept 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.9 High 3.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H CNA (AMD)
  • CISA KEV Not listed.
  • EPSS 0.0017, the 6th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 5 Sept 2025. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.