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    Dashboard / CVE / CVE-2021-26316

    CVE-2021-26316

    Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

    Published:Jan 10, 2023
    Last Modified:Apr 9, 2025
    EPS:Jan 10, 2023
    EPSS Score:0.00075
    CVSS Score:7.8

    Affected Products

    Vendor
    Amd
    Product
    Athlon 3050ge
    Vendor
    Amd
    Product
    Athlon 3050ge Firmware
    Vendor
    Amd
    Product
    Athlon 3150g
    Vendor
    Amd
    Product
    Athlon 3150g Firmware
    Vendor
    Amd
    Product
    Athlon 3150ge
    Vendor
    Amd
    Product
    Athlon 3150ge Firmware
    Vendor
    Amd
    Product
    Athlon Gold 3150c
    Vendor
    Amd
    Product
    Athlon Gold 3150c Firmware
    Vendor
    Amd
    Product
    Athlon Gold 3150ge
    Vendor
    Amd
    Product
    Athlon Gold 3150ge Firmware
    Vendor
    Amd
    Product
    Athlon Gold 3150u
    Vendor
    Amd
    Product
    Athlon Gold 3150u Firmware
    Vendor
    Amd
    Product
    Athlon Gold Pro 3150g
    Vendor
    Amd
    Product
    Athlon Gold Pro 3150g Firmware
    Vendor
    Amd
    Product
    Athlon Gold Pro 3150ge
    Vendor
    Amd
    Product
    Athlon Gold Pro 3150ge Firmware
    Vendor
    Amd
    Product
    Athlon Pro 3045b
    Vendor
    Amd
    Product
    Athlon Pro 3045b Firmware
    Vendor
    Amd
    Product
    Athlon Pro 3145b
    Vendor
    Amd
    Product
    Athlon Pro 3145b Firmware
    Vendor
    Amd
    Product
    Athlon Silver 3050c
    Vendor
    Amd
    Product
    Athlon Silver 3050c Firmware
    Vendor
    Amd
    Product
    Athlon Silver 3050e
    Vendor
    Amd
    Product
    Athlon Silver 3050e Firmware
    Vendor
    Amd
    Product
    Athlon Silver 3050ge
    Vendor
    Amd
    Product
    Athlon Silver 3050ge Firmware
    Vendor
    Amd
    Product
    Athlon Silver 3050u
    Vendor
    Amd
    Product
    Athlon Silver 3050u Firmware
    Vendor
    Amd
    Product
    Athlon Silver Pro 3125ge
    Vendor
    Amd
    Product
    Athlon Silver Pro 3125ge Firmware
    Vendor
    Amd
    Product
    Epyc 7002
    Vendor
    Amd
    Product
    Epyc 7002 Firmware
    Vendor
    Amd
    Product
    Epyc 7003
    Vendor
    Amd
    Product
    Epyc 7003 Firmware
    Vendor
    Amd
    Product
    Epyc 7232p
    Vendor
    Amd
    Product
    Epyc 7232p Firmware
    Vendor
    Amd
    Product
    Epyc 7252
    Vendor
    Amd
    Product
    Epyc 7252 Firmware
    Vendor
    Amd
    Product
    Epyc 7262
    Vendor
    Amd
    Product
    Epyc 7262 Firmware
    Vendor
    Amd
    Product
    Epyc 7272
    Vendor
    Amd
    Product
    Epyc 7272 Firmware
    Vendor
    Amd
    Product
    Epyc 7282
    Vendor
    Amd
    Product
    Epyc 7282 Firmware
    Vendor
    Amd
    Product
    Epyc 72f3
    Vendor
    Amd
    Product
    Epyc 72f3 Firmware
    Vendor
    Amd
    Product
    Epyc 7302
    Vendor
    Amd
    Product
    Epyc 7302 Firmware
    Vendor
    Amd
    Product
    Epyc 7302p
    Vendor
    Amd
    Product
    Epyc 7302p Firmware
    Vendor
    Amd
    Product
    Epyc 7313
    Vendor
    Amd
    Product
    Epyc 7313 Firmware
    Vendor
    Amd
    Product
    Epyc 7313p
    Vendor
    Amd
    Product
    Epyc 7313p Firmware
    Vendor
    Amd
    Product
    Epyc 7343
    Vendor
    Amd
    Product
    Epyc 7343 Firmware
    Vendor
    Amd
    Product
    Epyc 7352
    Vendor
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    Product
    Epyc 7352 Firmware
    Vendor
    Amd
    Product
    Epyc 7373x
    Vendor
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    Product
    Epyc 7373x Firmware
    Vendor
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    Product
    Epyc 73f3
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    Epyc 73f3 Firmware
    Vendor
    Amd
    Product
    Epyc 7402
    Vendor
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    Product
    Epyc 7402 Firmware
    Vendor
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    Product
    Epyc 7402p
    Vendor
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    Product
    Epyc 7402p Firmware
    Vendor
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    Product
    Epyc 7413
    Vendor
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    Product
    Epyc 7413 Firmware
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    Product
    Epyc 7443
    Vendor
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    Product
    Epyc 7443 Firmware
    Vendor
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    Product
    Epyc 7443p
    Vendor
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    Product
    Epyc 7443p Firmware
    Vendor
    Amd
    Product
    Epyc 7452
    Vendor
    Amd
    Product
    Epyc 7452 Firmware
    Vendor
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    Product
    Epyc 7453
    Vendor
    Amd
    Product
    Epyc 7453 Firmware
    Vendor
    Amd
    Product
    Epyc 74f3
    Vendor
    Amd
    Product
    Epyc 74f3 Firmware
    Vendor
    Amd
    Product
    Epyc 7502
    Vendor
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    Product
    Epyc 7502 Firmware
    Vendor
    Amd
    Product
    Epyc 7502p
    Vendor
    Amd
    Product
    Epyc 7502p Firmware
    Vendor
    Amd
    Product
    Epyc 7513
    Vendor
    Amd
    Product
    Epyc 7513 Firmware
    Vendor
    Amd
    Product
    Epyc 7532
    Vendor
    Amd
    Product
    Epyc 7532 Firmware
    Vendor
    Amd
    Product
    Epyc 7542
    Vendor
    Amd
    Product
    Epyc 7542 Firmware
    Vendor
    Amd
    Product
    Epyc 7543
    Vendor
    Amd
    Product
    Epyc 7543 Firmware
    Vendor
    Amd
    Product
    Epyc 7543p
    Vendor
    Amd
    Product
    Epyc 7543p Firmware
    Vendor
    Amd
    Product
    Epyc 7552
    Vendor
    Amd
    Product
    Epyc 7552 Firmware
    Vendor
    Amd
    Product
    Epyc 7573x
    Vendor
    Amd
    Product
    Epyc 7573x Firmware
    Vendor
    Amd
    Product
    Epyc 75f3
    Vendor
    Amd
    Product
    Epyc 75f3 Firmware
    Vendor
    Amd
    Product
    Epyc 7642
    Vendor
    Amd
    Product
    Epyc 7642 Firmware
    Vendor
    Amd
    Product
    Epyc 7643
    Vendor
    Amd
    Product
    Epyc 7643 Firmware
    Vendor
    Amd
    Product
    Epyc 7662
    Vendor
    Amd
    Product
    Epyc 7662 Firmware
    Vendor
    Amd
    Product
    Epyc 7663
    Vendor
    Amd
    Product
    Epyc 7663 Firmware
    Vendor
    Amd
    Product
    Epyc 7702
    Vendor
    Amd
    Product
    Epyc 7702 Firmware
    Vendor
    Amd
    Product
    Epyc 7702p
    Vendor
    Amd
    Product
    Epyc 7702p Firmware
    Vendor
    Amd
    Product
    Epyc 7713
    Vendor
    Amd
    Product
    Epyc 7713 Firmware
    Vendor
    Amd
    Product
    Epyc 7713p
    Vendor
    Amd
    Product
    Epyc 7713p Firmware
    Vendor
    Amd
    Product
    Epyc 7742
    Vendor
    Amd
    Product
    Epyc 7742 Firmware
    Vendor
    Amd
    Product
    Epyc 7743
    Vendor
    Amd
    Product
    Epyc 7743 Firmware
    Vendor
    Amd
    Product
    Epyc 7763
    Vendor
    Amd
    Product
    Epyc 7763 Firmware
    Vendor
    Amd
    Product
    Epyc 7773x
    Vendor
    Amd
    Product
    Epyc 7773x Firmware
    Vendor
    Amd
    Product
    Epyc 7f32
    Vendor
    Amd
    Product
    Epyc 7f32 Firmware
    Vendor
    Amd
    Product
    Epyc 7f52
    Vendor
    Amd
    Product
    Epyc 7f52 Firmware
    Vendor
    Amd
    Product
    Epyc 7f72
    Vendor
    Amd
    Product
    Epyc 7f72 Firmware
    Vendor
    Amd
    Product
    Epyc 7h12
    Vendor
    Amd
    Product
    Epyc 7h12 Firmware
    Vendor
    Amd
    Product
    Ryzen 3 2200g
    Vendor
    Amd
    Product
    Ryzen 3 2200g Firmware
    Vendor
    Amd
    Product
    Ryzen 3 2200ge
    Vendor
    Amd
    Product
    Ryzen 3 2200ge Firmware
    Vendor
    Amd
    Product
    Ryzen 3 2200u
    Vendor
    Amd
    Product
    Ryzen 3 2200u Firmware
    Vendor
    Amd
    Product
    Ryzen 3 2300u
    Vendor
    Amd
    Product
    Ryzen 3 2300u Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5125c
    Vendor
    Amd
    Product
    Ryzen 3 5125c Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5300g
    Vendor
    Amd
    Product
    Ryzen 3 5300g Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5300ge
    Vendor
    Amd
    Product
    Ryzen 3 5300ge Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5300u
    Vendor
    Amd
    Product
    Ryzen 3 5300u Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5400u
    Vendor
    Amd
    Product
    Ryzen 3 5400u Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5425c
    Vendor
    Amd
    Product
    Ryzen 3 5425c Firmware
    Vendor
    Amd
    Product
    Ryzen 3 5425u
    Vendor
    Amd
    Product
    Ryzen 3 5425u Firmware
    Vendor
    Amd
    Product
    Ryzen 3 Pro 2300u
    Vendor
    Amd
    Product
    Ryzen 3 Pro 2300u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2400g
    Vendor
    Amd
    Product
    Ryzen 5 2400g Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2400ge
    Vendor
    Amd
    Product
    Ryzen 5 2400ge Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2500u
    Vendor
    Amd
    Product
    Ryzen 5 2500u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2600
    Vendor
    Amd
    Product
    Ryzen 5 2600 Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2600h
    Vendor
    Amd
    Product
    Ryzen 5 2600h Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2600x
    Vendor
    Amd
    Product
    Ryzen 5 2600x Firmware
    Vendor
    Amd
    Product
    Ryzen 5 2700x
    Vendor
    Amd
    Product
    Ryzen 5 2700x Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5500
    Vendor
    Amd
    Product
    Ryzen 5 5500 Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5500u
    Vendor
    Amd
    Product
    Ryzen 5 5500u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5560u
    Vendor
    Amd
    Product
    Ryzen 5 5560u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600
    Vendor
    Amd
    Product
    Ryzen 5 5600 Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600g
    Vendor
    Amd
    Product
    Ryzen 5 5600g Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600ge
    Vendor
    Amd
    Product
    Ryzen 5 5600ge Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600h
    Vendor
    Amd
    Product
    Ryzen 5 5600h Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600hs
    Vendor
    Amd
    Product
    Ryzen 5 5600hs Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600u
    Vendor
    Amd
    Product
    Ryzen 5 5600u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5600x
    Vendor
    Amd
    Product
    Ryzen 5 5600x Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5625c
    Vendor
    Amd
    Product
    Ryzen 5 5625c Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5625u
    Vendor
    Amd
    Product
    Ryzen 5 5625u Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5700g
    Vendor
    Amd
    Product
    Ryzen 5 5700g Firmware
    Vendor
    Amd
    Product
    Ryzen 5 5700ge
    Vendor
    Amd
    Product
    Ryzen 5 5700ge Firmware
    Vendor
    Amd
    Product
    Ryzen 5 Pro 2500u
    Vendor
    Amd
    Product
    Ryzen 5 Pro 2500u Firmware
    Vendor
    Amd
    Product
    Ryzen 7 2700
    Vendor
    Amd
    Product
    Ryzen 7 2700 Firmware
    Vendor
    Amd
    Product
    Ryzen 7 2700u
    Vendor
    Amd
    Product
    Ryzen 7 2700u Firmware
    Vendor
    Amd
    Product
    Ryzen 7 2700x
    Vendor
    Amd
    Product
    Ryzen 7 2700x Firmware
    Vendor
    Amd
    Product
    Ryzen 7 2800h
    Vendor
    Amd
    Product
    Ryzen 7 2800h Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5700g
    Vendor
    Amd
    Product
    Ryzen 7 5700g Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5700ge
    Vendor
    Amd
    Product
    Ryzen 7 5700ge Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5700u
    Vendor
    Amd
    Product
    Ryzen 7 5700u Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5700x
    Vendor
    Amd
    Product
    Ryzen 7 5700x Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800
    Vendor
    Amd
    Product
    Ryzen 7 5800 Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800h
    Vendor
    Amd
    Product
    Ryzen 7 5800h Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800hs
    Vendor
    Amd
    Product
    Ryzen 7 5800hs Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800u
    Vendor
    Amd
    Product
    Ryzen 7 5800u Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800x
    Vendor
    Amd
    Product
    Ryzen 7 5800x3d
    Vendor
    Amd
    Product
    Ryzen 7 5800x3d Firmware
    Vendor
    Amd
    Product
    Ryzen 7 5800x Firmware
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    Amd
    Product
    Ryzen 7 5825c
    Vendor
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    Product
    Ryzen 7 5825c Firmware
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    Amd
    Product
    Ryzen 7 5825u
    Vendor
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    Product
    Ryzen 7 5825u Firmware
    Vendor
    Amd
    Product
    Ryzen 7 Pro 2700u
    Vendor
    Amd
    Product
    Ryzen 7 Pro 2700u Firmware
    Vendor
    Amd
    Product
    Ryzen 9 5900
    Vendor
    Amd
    Product
    Ryzen 9 5900 Firmware
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    Amd
    Product
    Ryzen 9 5900hs
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    Ryzen 9 5900hs Firmware
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    Product
    Ryzen 9 5900hx
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    Ryzen 9 5900hx Firmware
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    Ryzen 9 5900x
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    Ryzen 9 5900x Firmware
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    Product
    Ryzen 9 5950x
    Vendor
    Amd
    Product
    Ryzen 9 5950x Firmware
    Vendor
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    Product
    Ryzen 9 5980hs
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    Amd
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    Ryzen 9 5980hs Firmware
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    Amd
    Product
    Ryzen 9 5980hx
    Vendor
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    Ryzen 9 5980hx Firmware
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    Product
    Ryzen Pro 2200g
    Vendor
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    Product
    Ryzen Pro 2200g Firmware
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    Product
    Ryzen Pro 2200ge
    Vendor
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    Ryzen Pro 2200ge Firmware
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    Product
    Ryzen Pro 2400g
    Vendor
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    Ryzen Pro 2400g Firmware
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    Product
    Ryzen Pro 2400ge
    Vendor
    Amd
    Product
    Ryzen Pro 2400ge Firmware
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    Product
    Ryzen Pro 5350g
    Vendor
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    Product
    Ryzen Pro 5350g Firmware
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    Product
    Ryzen Pro 5350ge
    Vendor
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    Product
    Ryzen Pro 5350ge Firmware
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    Product
    Ryzen Pro 5650g
    Vendor
    Amd
    Product
    Ryzen Pro 5650g Firmware
    Vendor
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    Product
    Ryzen Pro 5650ge
    Vendor
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    Product
    Ryzen Pro 5650ge Firmware
    Vendor
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    Product
    Ryzen Pro 5750g
    Vendor
    Amd
    Product
    Ryzen Pro 5750g Firmware
    Vendor
    Amd
    Product
    Ryzen Pro 5750ge
    Vendor
    Amd
    Product
    Ryzen Pro 5750ge Firmware
    Vendor
    Amd
    Product
    Ryzen Threadripper 2920x
    Vendor
    Amd
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    Ryzen Threadripper 2920x Firmware
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    Amd
    Product
    Ryzen Threadripper 2950x
    Vendor
    Amd
    Product
    Ryzen Threadripper 2950x Firmware
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    Amd
    Product
    Ryzen Threadripper 2970wx
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    Amd
    Product
    Ryzen Threadripper 2970wx Firmware
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    Amd
    Product
    Ryzen Threadripper 2990wx
    Vendor
    Amd
    Product
    Ryzen Threadripper 2990wx Firmware
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3795wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3795wx Firmware
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    Amd
    Product
    Ryzen Threadripper Pro 3945wx
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    Amd
    Product
    Ryzen Threadripper Pro 3945wx Firmware
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    Amd
    Product
    Ryzen Threadripper Pro 3955wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3955wx Firmware
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    Amd
    Product
    Ryzen Threadripper Pro 3975wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3975wx Firmware
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3995wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 3995wx Firmware
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 5945wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 5945wx Firmware
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    Amd
    Product
    Ryzen Threadripper Pro 5955wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 5955wx Firmware
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    Product
    Ryzen Threadripper Pro 5965wx
    Vendor
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    Product
    Ryzen Threadripper Pro 5965wx Firmware
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    Product
    Ryzen Threadripper Pro 5975wx
    Vendor
    Amd
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    Ryzen Threadripper Pro 5975wx Firmware
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 5995wx
    Vendor
    Amd
    Product
    Ryzen Threadripper Pro 5995wx Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-20 Improper Input Validation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

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    CVE-2021-26317 (CVSS 7.8) — Failure to verify the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resul…
    CVE-2021-26361 (CVSS 5.5) — A malicious or compromised User Application (UApp) or AGESA Boot Loader (ABL) could be used by an attacker to …
    CVE-2021-26362 (CVSS 7.1) — A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call which resul…
    CVE-2021-26366 (CVSS 7.1) — An attacker, who gained elevated privileges via some other vulnerability, may be able to read data from Boot R…
    CVE-2021-26369 (CVSS 7.8) — A malicious or compromised UApp or ABL may be used by an attacker to send a malformed system call to the bootl…
    CVE-2020-12965 (CVSS 7.5) — When combined with specific software sequences, AMD CPUs may transiently execute non-canonical loads and store…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High