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TI-2023-01497 Aliases CVE-2023-1587GHSA-2778-cfx6-g2xp

NULL pointer dereference in Avast Antivirus

Priority LOW 25CWE-476Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-476.

Summary

Avast and AVG Antivirus for Windows were susceptible to a NULL pointer dereference issue via RPC-interface. The issue was fixed with Avast and AVG Antivirus version 22.11

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00211 11th 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
AvastAvast Antivirus22.5 – 22.10—No fix listedCNA
AVGAVG Antivirus22.5 – 22.10—No fix listedCNA
  • Avast Antivirus VendorAvast Affected 22.5 – 22.10 Fixed in — No fix listed CNA
  • AVG Antivirus VendorAVG Affected 22.5 – 22.10 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*22.5 to before 22.11VulnerableAvast
cpe:2.3:a:avg:anti-virus:*:*:*:*:*:*:*:*22.5 to before 22.11VulnerableAVG
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:* Versions 22.5 to before 22.11 Vulnerable ·Avast
  • cpe:2.3:a:avg:anti-virus:*:*:*:*:*:*:*:* Versions 22.5 to before 22.11 Vulnerable ·AVG
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1587
  2. 2026-10-03 Alias added: GHSA-2778-cfx6-g2xp

References

Advisory 1

  • TI-2020-08753 An issue was discovered in Avast Antivirus before 20. CVSS 3.1CRITICAL 9.8
  • TI-2017-05872 In Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe… CVSS 3.0CRITICAL 9.8
  • TI-2025-03074 Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation CVSS 3.1CRITICAL 9.8
  • TI-2025-11929 Time-of-check time-of-use race condition in Avast Antivirus CVSS 3.1CRITICAL 9.9
  • TI-2021-20488 Privilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to… CVSS 3.1HIGH 8.8
  • TI-2021-20487 Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to… CVSS 3.1HIGH 8.8
See all 31 →

Sources

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