4.8

CVE-2025-8735: gnu cflow Improper Resource Shutdown or Release

CVSS: 4.8v4.0MediumDeferred
AliasesUBUNTU-CVE-2025-8735DEBIAN-CVE-2025-8735
Published 08-08-2025Last modified 28-10-2025
Open JSON

Vulnerability summary

CVE-2025-8735 is a medium (CVSS 4.8) Improper Resource Shutdown or Release vulnerability in gnu cflow. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.8/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.15%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 08-08-2025
    PublishedVulnerability first disclosed.
  2. 28-10-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

10 scores · 4 sources · 4 versions

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

+0.01 pp

From 0.15% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (drive.google.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • cflowAll versions (No fix recorded)
Gnu1 product
  • cflow1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8
Ubuntu1 product
  • cflowAll versions (No fix recorded)

3 vendors · 3 products

References

10 links