Buffer overflow in Gnu Cflow
CVE-2025-8736
A vulnerability, which was classified as critical, has been found in GNU cflow up to 1.8. Affected by this issue is the function yylex of the file c.c of the component Lexer. The manipulation leads to buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (5.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Gnu Cflow — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (related)
- cna@vuldb.com (exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2025-8736?
- CVE-2025-8736 is a medium-severity vulnerability in Gnu Cflow, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-08-08.
- How severe is CVE-2025-8736?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-8736 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.