Medium severity5.5NVD Advisory· Published Nov 16, 2021· Updated Jun 17, 2026

CVE-2021-26336

Description

Insufficient bounds checking in System Management Unit (SMU) may cause invalid memory accesses/updates that could result in SMU hang and subsequent failure to service any further requests from other components.

Affected products

AMD/Epyc 7002 Firmware
cpe:2.3:o:amd:epyc_7002_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7003 Firmware
cpe:2.3:o:amd:epyc_7003_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7642 Firmware3 versions
cpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7552_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7642_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
AMD/Epyc 7252 Firmware
cpe:2.3:o:amd:epyc_7252_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7262 Firmware
cpe:2.3:o:amd:epyc_7262_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7742 Firmware4 versions
cpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7402p_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7702p_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7742_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
AMD/Epyc 7542 Firmware2 versions
cpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7542_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
AMD/Epyc 72f3 Firmware
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7302 Firmware2 versions
cpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7502p_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
AMD/Epyc 7302p Firmware
cpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7313 Firmware
cpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7313p Firmware
cpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7343 Firmware
cpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7352 Firmware
cpe:2.3:o:amd:epyc_7352_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 73f3 Firmware
cpe:2.3:o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7402 Firmware
cpe:2.3:o:amd:epyc_7402_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7413 Firmware
cpe:2.3:o:amd:epyc_7413_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7443 Firmware
cpe:2.3:o:amd:epyc_7443_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7443p Firmware
cpe:2.3:o:amd:epyc_7443p_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7452 Firmware
cpe:2.3:o:amd:epyc_7452_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7453 Firmware
cpe:2.3:o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 74f3 Firmware
cpe:2.3:o:amd:epyc_74f3_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7502 Firmware
cpe:2.3:o:amd:epyc_7502_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7513 Firmware
cpe:2.3:o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7f32 Firmware2 versions
cpe:2.3:o:amd:epyc_7532_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:amd:epyc_7532_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
- cpe:2.3:o:amd:epyc_7f32_firmware:*:*:*:*:*:*:*:*range: <romepi-sp3_1.0.0.c
AMD/Epyc 7543 Firmware
cpe:2.3:o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7543p Firmware
cpe:2.3:o:amd:epyc_7543p_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 75f3 Firmware
cpe:2.3:o:amd:epyc_75f3_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7643 Firmware
cpe:2.3:o:amd:epyc_7643_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7662 Firmware
cpe:2.3:o:amd:epyc_7662_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7663 Firmware
cpe:2.3:o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7702 Firmware
cpe:2.3:o:amd:epyc_7702_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Epyc 7713 Firmware
cpe:2.3:o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7713p Firmware
cpe:2.3:o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7763 Firmware
cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*
Range: <milanpi-sp3_1.0.0.4
AMD/Epyc 7f52 Firmware
cpe:2.3:o:amd:epyc_7f52_firmware:*:*:*:*:*:*:*:*
Range: <romepi-sp3_1.0.0.c
AMD/Ryzen 5 5600u Firmware2 versions
cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:ryzen_5_5600u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 3300g Firmware
cpe:2.3:o:amd:ryzen_3_3300g_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 3300x Firmware
cpe:2.3:o:amd:ryzen_3_3300x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 5125c Firmware
cpe:2.3:o:amd:ryzen_3_5125c_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 5400u Firmware
cpe:2.3:o:amd:ryzen_3_5400u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 5425c Firmware
cpe:2.3:o:amd:ryzen_3_5425c_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 3 5425u Firmware
cpe:2.3:o:amd:ryzen_3_5425u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 3400g Firmware
cpe:2.3:o:amd:ryzen_5_3400g_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 3450g Firmware
cpe:2.3:o:amd:ryzen_5_3450g_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 3600 Firmware
cpe:2.3:o:amd:ryzen_5_3600_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 3600x Firmware
cpe:2.3:o:amd:ryzen_5_3600x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5560u Firmware
cpe:2.3:o:amd:ryzen_5_5560u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5600h Firmware
cpe:2.3:o:amd:ryzen_5_5600h_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5600hs Firmware
cpe:2.3:o:amd:ryzen_5_5600hs_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5600x Firmware
cpe:2.3:o:amd:ryzen_5_5600x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5625c Firmware
cpe:2.3:o:amd:ryzen_5_5625c_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5625u Firmware
cpe:2.3:o:amd:ryzen_5_5625u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5700g Firmware
cpe:2.3:o:amd:ryzen_5_5700g_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 5 5700ge Firmware
cpe:2.3:o:amd:ryzen_5_5700ge_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 3800x Firmware
cpe:2.3:o:amd:ryzen_7_3800x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 5800h Firmware
cpe:2.3:o:amd:ryzen_7_5800h_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 5800hs Firmware
cpe:2.3:o:amd:ryzen_7_5800hs_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 5800u Firmware
cpe:2.3:o:amd:ryzen_7_5800u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 5825c Firmware
cpe:2.3:o:amd:ryzen_7_5825c_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 7 5825u Firmware
cpe:2.3:o:amd:ryzen_7_5825u_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 3900x Firmware
cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 3950x Firmware
cpe:2.3:o:amd:ryzen_9_3950x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 5900hs Firmware
cpe:2.3:o:amd:ryzen_9_5900hs_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 5900hx Firmware
cpe:2.3:o:amd:ryzen_9_5900hx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 5980hs Firmware
cpe:2.3:o:amd:ryzen_9_5980hs_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen 9 5980hx Firmware
cpe:2.3:o:amd:ryzen_9_5980hx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 1900x Firmware
cpe:2.3:o:amd:ryzen_threadripper_1900x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 1920x Firmware
cpe:2.3:o:amd:ryzen_threadripper_1920x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 1950x Firmware
cpe:2.3:o:amd:ryzen_threadripper_1950x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 2920x Firmware2 versions
cpe:2.3:o:amd:ryzen_threadripper_2920x_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:amd:ryzen_threadripper_2920x_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:ryzen_threadripper_pro_5995wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 2950x Firmware
cpe:2.3:o:amd:ryzen_threadripper_2950x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 2970wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_2970wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 2990wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_2990wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 3960x Firmware
cpe:2.3:o:amd:ryzen_threadripper_3960x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 3970x Firmware
cpe:2.3:o:amd:ryzen_threadripper_3970x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper 3990x Firmware
cpe:2.3:o:amd:ryzen_threadripper_3990x_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 3945wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_3945wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 3955wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_3955wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 3975wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_3975wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 3995wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_3995wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 5945wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_5945wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 5955wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_5955wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 5965wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_5965wx_firmware:-:*:*:*:*:*:*:*
AMD/Ryzen Threadripper Pro 5975wx Firmware
cpe:2.3:o:amd:ryzen_threadripper_pro_5975wx_firmware:-:*:*:*:*:*:*:*
AMD/System Management Unitllm-fuzzy
AMD/Athlon™ Seriesv5
Range: various
AMD/Ryzen™ Seriesv5
Range: various

Patches

Vulnerability mechanics

References

www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027nvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000