CVE-2020-12954

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-16 · updated 2026-06-17
Weakness: CWE-693

Description

A side effect of an integrated chipset option may be able to be used by an attacker to bypass SPI ROM protections, allowing unauthorized SPI ROM modification.

Affected products

AMD Epyc 7001 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7002 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7003 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7232P Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7251 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7252 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7262 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7272 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7281 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7282 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 72F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7301 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7302 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7302P Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7313 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7313P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7343 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7351 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7351P Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7352 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 73F3 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7401 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7401P Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7402 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7402P Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c
AMD Epyc 7413 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7443 Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7443P Firmware: before milanpi-sp3_1.0.0.4 — fixed in milanpi-sp3_1.0.0.4
AMD Epyc 7451 Firmware: before naplespi-sp3_1.0.0.g — fixed in naplespi-sp3_1.0.0.g
AMD Epyc 7452 Firmware: before romepi-sp3_1.0.0.c — fixed in romepi-sp3_1.0.0.c

How to fix

Upgrade to a fixed version: AMD Epyc 7001 Firmware naplespi-sp3_1.0.0.g; AMD Epyc 7002 Firmware romepi-sp3_1.0.0.c; AMD Epyc 7003 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7232P Firmware romepi-sp3_1.0.0.c; AMD Epyc 7251 Firmware naplespi-sp3_1.0.0.g; AMD Epyc 7252 Firmware romepi-sp3_1.0.0.c; AMD Epyc 7262 Firmware romepi-sp3_1.0.0.c; AMD Epyc 7272 Firmware romepi-sp3_1.0.0.c; AMD Epyc 7281 Firmware naplespi-sp3_1.0.0.g; AMD Epyc 7282 Firmware romepi-sp3_1.0.0.c; AMD Epyc 72F3 Firmware milanpi-sp3_1.0.0.4; AMD Epyc 7301 Firmware naplespi-sp3_1.0.0.g. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-12954 or the next vulnerability affects your stack