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TI-2024-08802 Aliases CVE-2024-9484GHSA-jjm3-8267-chq9

NULL pointer dereference in Avast Antivirus

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

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

Summary

An null-pointer-derefrence in the engine module in AVG/Avast Antivirus signature <24092400 released on 24/Sep/2024 on MacOS allows a malformed xar file to crash the application during file processing.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00134 2nd percentileScored 2026-11-07
Fix Fixed Antivirus (AVG/Avast): < 24092400

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
AvastAntivirus24/Sep/2024 to before < 24092400< 24092400Patch availableCNA
  • Antivirus VendorAvast Affected 24/Sep/2024 to before < 24092400 Fixed in < 24092400 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:avast:antivirus:*:*:*:*:*:macos:*:*before 24092400VulnerableAvast
cpe:2.3:a:avg:antivirus:*:*:*:*:*:macos:*:*before 24092400VulnerableAVG
  • cpe:2.3:a:avast:antivirus:*:*:*:*:*:macos:*:* Versions before 24092400 Vulnerable ·Avast
  • cpe:2.3:a:avg:antivirus:*:*:*:*:*:macos:*:* Versions before 24092400 Vulnerable ·AVG

Remediation

  • Fix · CNA Antivirus (AVG/Avast) Fixed in < 24092400

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    AVG/Avast Antivirus < 24092400

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2024-08801 Uninitialized variable in digital signiture verification may crash the applicationPriority LOW 24
    • TI-2024-08800 Out of Bounds write on scan of malformed Mach-O file may crash the applicationPriority LOW 24
    • TI-2024-08799 Out of Bounds write on scan of malformed eml file may crash the applicationPriority LOW 24
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-9484
  2. 2026-10-03 Alias added: GHSA-jjm3-8267-chq9

References

Other 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