Read the docs
TI-2024-22243 Aliases CVE-2024-33659GHSA-r8rq-6jrf-gqrw

BiosGuard Buffer Overflow and TOCTOU Vulnerability

Priority LOW 25CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0016 5th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AMIAptioVBKS_5.0 – BKS_5.38—No fix listedCNA
  • AptioV VendorAMI Affected BKS_5.0 – BKS_5.38 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:ami:aptio_v:*:*:*:*:*:*:*:*5.0 to before 5.038VulnerableAMI
  • cpe:2.3:o:ami:aptio_v:*:*:*:*:*:*:*:* Versions 5.0 to before 5.038 Vulnerable ·AMI

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-33659
  2. 2026-10-03 Alias added: GHSA-r8rq-6jrf-gqrw

References

Advisory 1

  • TI-2022-19108 The arbitrary write vulnerability in S3Resume2Pei leads to arbitrary code execution during PEI phase. CVSS 3.1HIGH 8.2
  • TI-2022-19103 Stack overflow vulnerability in SMI handler on SmmSmbiosElog. CVSS 3.1HIGH 8.8
  • TI-2022-19107 SMM memory corruption vulnerability in OverClockSmiHandler SMM driver CVSS 3.1HIGH 8.2
  • TI-2022-10117 Stack-based buffer overflow in AMI Aptio CVSS 3.1HIGH 8.2
  • TI-2024-28413 Runtime Service Access outside SMRAM CVSS 3.1HIGH 8.8
  • TI-2025-24038 Legacy Serial Redirection SMRAM Vulnerabilities CVSS 3.1HIGH 8.2
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences