CVE-2025-8736: GNU cflow Lexer c.c yylex buffer overflow

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-08 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

GNU cflow: 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 (+3)

References

https://drive.google.com/file/d/17lkJ5bSiQZoXLTg3bK-rGBt3kahN9Xse/view?usp=drive_link
https://lists.gnu.org/archive/html/bug-cflow/2025-07/msg00001.html
https://vuldb.com/?ctiid.319232
https://vuldb.com/?id.319232
https://vuldb.com/?submit.622329
https://www.gnu.org/

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