Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (…

published 2023-01-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13204

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits: 0; none known

Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which may lead to potential arbitrary code execution.

Patch / fix

fixed in 20

amd epyc_7h12_firmware romepi_1.0.0.c
amd epyc_7f72_firmware romepi_1.0.0.c
amd epyc_7f52_firmware romepi_1.0.0.c
amd epyc_7f32_firmware romepi_1.0.0.c
amd epyc_7742_firmware romepi_1.0.0.c
amd epyc_7702p_firmware romepi_1.0.0.c
amd epyc_7702_firmware romepi_1.0.0.c
amd epyc_7662_firmware romepi_1.0.0.c
amd epyc_7642_firmware romepi_1.0.0.c
amd epyc_7552_firmware romepi_1.0.0.c
amd epyc_7542_firmware romepi_1.0.0.c
amd epyc_7532_firmware romepi_1.0.0.c
amd epyc_7502p_firmware romepi_1.0.0.c
amd epyc_7502_firmware romepi_1.0.0.c
amd epyc_7452_firmware romepi_1.0.0.c
amd epyc_7402_firmware romepi_1.0.0.c
amd epyc_7402p_firmware romepi_1.0.0.c
amd epyc_7352_firmware romepi_1.0.0.c
amd epyc_7302p_firmware romepi_1.0.0.c
amd epyc_7302_firmware romepi_1.0.0.c

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 19 mo ago (2025-04-09)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

AMD 1st Gen EPYC
AMD 2nd Gen EPYC
AMD 3rd Gen EPYC

Classification

Weakness

CWE-787 Out-of-bounds Write

References

amd.com /en/corporate/product-security/bulletin/AMD-SB-1032
vendor-advisory

Sources

CVE List CVE-2021-26398
NVD CVE-2021-26398

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.

Summary