Clamav: Heap-buffer-overflow in cli_strlcat
A heap-buffer-overflow vulnerability was identified in the ClamAV antivirus software within the cli_strlcat function, as reported by OSS-Fuzz. The issue causes a write overflow on the heap, potentially leading to a crash during YARA rule parsing. No CVSS score or vendor patch information is provided, and no known exploits are reported in the wild. The affected versions include the commit e5f001c9ca4175beecd445004a8e01bbdd29579c and later. The severity is assessed as medium based on the available data.
AI Analysis
Technical Summary
OSS-Fuzz reported a heap-buffer-overflow vulnerability in ClamAV's cli_strlcat function, which manifests as a write overflow on the heap. The crash occurs during the parsing of YARA rules (yara_yyparse and yr_lex_parse_rules_file). This vulnerability could cause program crashes or potentially other undefined behavior due to memory corruption. No CVSS score or detailed vendor advisory is available, and no patch links are provided. The affected versions are those at or after commit e5f001c9ca4175beecd445004a8e01bbdd29579c.
Potential Impact
The vulnerability causes a heap-buffer-overflow write, which can lead to application crashes or memory corruption. There are no known exploits in the wild, and no further impact details are provided. Without a patch or mitigation details, the risk remains unmitigated in affected versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor ClamAV vendor channels and OSS-Fuzz reports for updates. Avoid processing untrusted YARA rules until a fix is available.
Clamav: Heap-buffer-overflow in cli_strlcat
Description
A heap-buffer-overflow vulnerability was identified in the ClamAV antivirus software within the cli_strlcat function, as reported by OSS-Fuzz. The issue causes a write overflow on the heap, potentially leading to a crash during YARA rule parsing. No CVSS score or vendor patch information is provided, and no known exploits are reported in the wild. The affected versions include the commit e5f001c9ca4175beecd445004a8e01bbdd29579c and later. The severity is assessed as medium based on the available data.
Affected software
pkg:generic/clamavRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OSS-Fuzz reported a heap-buffer-overflow vulnerability in ClamAV's cli_strlcat function, which manifests as a write overflow on the heap. The crash occurs during the parsing of YARA rules (yara_yyparse and yr_lex_parse_rules_file). This vulnerability could cause program crashes or potentially other undefined behavior due to memory corruption. No CVSS score or detailed vendor advisory is available, and no patch links are provided. The affected versions are those at or after commit e5f001c9ca4175beecd445004a8e01bbdd29579c.
Potential Impact
The vulnerability causes a heap-buffer-overflow write, which can lead to application crashes or memory corruption. There are no known exploits in the wild, and no further impact details are provided. Without a patch or mitigation details, the risk remains unmitigated in affected versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor ClamAV vendor channels and OSS-Fuzz reports for updates. Avoid processing untrusted YARA rules until a fix is available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- OSV-2022-94
- Osv Schema Version
- 1.2.0
- Ecosystems
- ["OSS-Fuzz"]
Threat ID: 6a46ecdf27e9c79719440c16
Added to database: 07/02/2026, 22:57:35 UTC
Last enriched: 08/09/2026, 18:07:50 UTC
Last updated: 09/05/2026, 07:12:35 UTC
Views: 29
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