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Fencer Vulns
medium 5.5

CVE-2021-26393 json

Insufficient memory cleanup in the AMD Secure Processor (ASP) Trusted Execution Environment (TEE) may allow an authenticated attacker with…

published 2022-11-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13199

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

Insufficient memory cleanup in the AMD Secure Processor (ASP) Trusted Execution Environment (TEE) may allow an authenticated attacker with privileges to generate a valid signed TA and potentially poison the contents of the process memory with attacker controlled data resulting in a loss of confidentiality.

Patch / fix

  • AMD AMD Radeon RX 5000 Series & PRO W5000 Series 22.5.2, 22.10.20, 22.Q2
  • AMD AMD Radeon RX 6000 Series & PRO W6000 Series 22.5.2, 22.10.20, 22.Q2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-26393 updated cvss 4.1

hw: amd: Insufficient memory cleanup in ASP Trusted Execution Environment (TEE) may poison process contents

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • AMD AMD Radeon RX 5000 Series & PRO W5000 Series
  • AMD AMD Radeon RX 6000 Series & PRO W6000 Series
  • AMD AMD Ryzen™ Embedded R1000
  • AMD AMD Ryzen™ Embedded R2000
  • AMD AMD Ryzen™ Embedded V1000
  • AMD AMD Ryzen™ Embedded V2000

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.