Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus…
Priority MEDIUM 51CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to execute arbitrary code via a crafted UPX packed file containing sections with large rsize values.
Why it matters now
EPSS 0.19396 97th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 19
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:clamav:clamav:0.81:*:*:*:*:*:*:* | 0.81 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.81:rc1:*:*:*:*:*:* | 0.81 rc1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.82:*:*:*:*:*:*:* | 0.82 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.83:*:*:*:*:*:*:* | 0.83 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.84:*:*:*:*:*:*:* | 0.84 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.84:rc1:*:*:*:*:*:* | 0.84 rc1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.84:rc2:*:*:*:*:*:* | 0.84 rc2 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.85:*:*:*:*:*:*:* | 0.85 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.85.1:*:*:*:*:*:*:* | 0.85.1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.86:*:*:*:*:*:*:* | 0.86 | Vulnerable | ClamAV |
- cpe:2.3:a:clamav:clamav:0.81:*:*:*:*:*:*:* Versions 0.81 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.81:rc1:*:*:*:*:*:* Versions 0.81 rc1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.82:*:*:*:*:*:*:* Versions 0.82 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.83:*:*:*:*:*:*:* Versions 0.83 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.84:*:*:*:*:*:*:* Versions 0.84 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.84:rc1:*:*:*:*:*:* Versions 0.84 rc1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.84:rc2:*:*:*:*:*:* Versions 0.84 rc2 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.85:*:*:*:*:*:*:* Versions 0.85 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.85.1:*:*:*:*:*:*:* Versions 0.85.1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.86:*:*:*:*:*:*:* Versions 0.86 Vulnerable ·ClamAV
Show 9 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:clamav:clamav:0.86:rc1:*:*:*:*:*:* | 0.86 rc1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.86.1:*:*:*:*:*:*:* | 0.86.1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.86.2:*:*:*:*:*:*:* | 0.86.2 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.87:*:*:*:*:*:*:* | 0.87 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.87.1:*:*:*:*:*:*:* | 0.87.1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.88:*:*:*:*:*:*:* | 0.88 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.88.1:*:*:*:*:*:*:* | 0.88.1 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.88.2:*:*:*:*:*:*:* | 0.88.2 | Vulnerable | ClamAV |
| cpe:2.3:a:clamav:clamav:0.88.3:*:*:*:*:*:*:* | 0.88.3 | Vulnerable | ClamAV |
- cpe:2.3:a:clamav:clamav:0.86:rc1:*:*:*:*:*:* Versions 0.86 rc1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.86.1:*:*:*:*:*:*:* Versions 0.86.1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.86.2:*:*:*:*:*:*:* Versions 0.86.2 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.87:*:*:*:*:*:*:* Versions 0.87 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.87.1:*:*:*:*:*:*:* Versions 0.87.1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.88:*:*:*:*:*:*:* Versions 0.88 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.88.1:*:*:*:*:*:*:* Versions 0.88.1 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.88.2:*:*:*:*:*:*:* Versions 0.88.2 Vulnerable ·ClamAV
- cpe:2.3:a:clamav:clamav:0.88.3:*:*:*:*:*:*:* Versions 0.88.3 Vulnerable ·ClamAV
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-4018
- 2026-10-03 Alias added: GHSA-4jgv-gpc4-9rmg
References
More Clamav vulnerabilities
- TI-2024-13262 ClamAV VirusEvent File Processing Command Injection Vulnerability CVSS 3.1MEDIUM 5.3
- TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
- TI-2012-01281 The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir… CVSS 2.0MEDIUM 4.3
- TI-2012-01279 The TAR file parser in Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK 2.0.3.7, avast!… CVSS 2.0MEDIUM 4.3
- TI-2012-01265 The RAR file parser in ClamAV 0.96.4, Rising Antivirus 22.83.00.03, Quick Heal (aka Cat… CVSS 2.0MEDIUM 4.3
- TI-2017-09151 Memory corruption in ClamAV AntiVirus software versions 0.99.2 and prior CVSS 3.0CRITICAL 9.8
Sources
- CVE-2006-4018 · CVE Program
- CVE-2006-4018 · NVD
- FIRST EPSS
- GHSA-4jgv-gpc4-9rmg · GitHub Advisory Database · CC BY 4.0
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