NULL pointer dereference in GNU Cflow
CVE-2025-8735
A vulnerability classified as problematic was found in GNU cflow up to 1.8. Affected by this vulnerability is the function yylex of the file c.c of the component Lexer. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (3.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- GNU Cflow — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- lists.gnu.org/archive/html/bug-cflow/2025-07/msg00000.html (related)
- drive.google.com/file/d/1Q_rDQSEl3cBu6SUbfqr9pV9cHgvKcXFI/view (exploit)
- www.gnu.org/ (product)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-8735?
- CVE-2025-8735 is a low-severity vulnerability in GNU Cflow, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2025-08-08.
- How severe is CVE-2025-8735?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2025-8735 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.