VDB-319231 · CVE-2025-8735 · EUVD-2025-24014

GNU cflow up to 1.8 Lexer c.c yylex null pointer dereference

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3.1	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in GNU cflow up to 1.8 and classified as problematic. Affected by this vulnerability is the function yylex of the file c.c of the component Lexer. This manipulation causes null pointer dereference. This vulnerability is handled as CVE-2025-8735. It is possible to launch the attack on the local host. Additionally, an exploit exists.

Detailsinfo

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 with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

It is possible to read the advisory at lists.gnu.org. This vulnerability is known as CVE-2025-8735. The exploitation appears to be easy. Attacking locally is a requirement. Technical details and also a public exploit are known.

It is possible to download the exploit at drive.google.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 253546 (Linux Distros Unpatched Vulnerability : CVE-2025-8735), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (253546) and EUVD (EUVD-2025-24014). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

cflow

Version

License

open-source

Website

Vendor: https://www.gnu.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 253546
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-8735

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/08/2025 Advisory disclosed
08/08/2025 +0 days VulDB entry created
10/28/2025 +81 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: lists.gnu.org
Status: Not defined

CVE: CVE-2025-8735 (🔒)
GCVE (CVE): GCVE-0-2025-8735
GCVE (VulDB): GCVE-100-319231
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/08/2025 10:17
Updated: 10/28/2025 02:36
Changes: 08/08/2025 10:17 (56), 08/09/2025 03:39 (30), 08/09/2025 04:51 (1), 08/23/2025 23:03 (2), 10/28/2025 02:36 (1)
Complete: 🔍
Cache ID: 216::103

Submitinfo

Accepted

Submit #622328: GNU cflow cflow cflow (GNU cflow) the newest master (0a19319e282506ff88d19e630380cd5069e893ed ) in cflow.git - GNU cflow Null Pointer Dereference (by lists.gnu.org)