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Fencer Vulns
medium 6.5

CVE-2021-39298 json

A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SM…

published 2022-02-16 4 y ago modified 2026-10-07 32 d ago also EUVD-2021-25659

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

A potential vulnerability in AMD System Management Mode (SMM) interrupt handler may allow an attacker with high privileges to access the SMM resulting in arbitrary code execution which could be used by malicious actors to bypass security mechanisms provided in the UEFI firmware.

Patch / fix

  • hp z1_entry_tower_g5_workstation_firmware 02.12.00
  • hp z1_entry_tower_g6_workstation_firmware 02.10.00
  • hp z1_g8_tower_desktop_pc_firmware 02.07.00
  • hp z4_g4_workstation_(core-x)_firmware 02.75
  • hp z4_g4_workstation_(xeon_w)_firmware 02.75
  • hp z6_g4_workstation_firmware 02.75
  • hp z8_g4_workstation_firmware 02.75
  • hp engage_flex_mini_retail_system_firmware 02.10.00
  • hp mp9_g4_retail_system_firmware 02.18.00
  • hp elite_dragonfly_firmware 01.12.00
  • hp elite_dragonfly_g2_firmware 01.08.00
  • hp elite_dragonfly_max_firmware 01.08.00
  • hp elite_x2_1013_g3_firmware 01.19.00
  • hp elite_x2_g4_firmware 01.12.00
  • hp elite_x2_g8_tablet_firmware 01.08.00
  • hp elitebook_1050_g1_firmware 01.19.00
  • hp elitebook_830_g5_firmware 01.19.00
  • hp elitebook_830_g6_firmware 01.12.00
  • hp elitebook_830_g7_firmware 01.08.00
  • hp elitebook_830_g8_firmware 01.08.00

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
33 d ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 6.5 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • AMD 2nd Gen EPYC
  • AMD 3rd Gen EPYC
  • AMD Ryzen 2000 Series
  • AMD Ryzen 3000 Series
  • AMD Ryzen 5000 Series

Classification

Weakness
  • CWE-269 Improper Privilege Management

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.