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Vulnerability · Published Aug 8, 2025 · Assigned by VulDB

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

Medium 5.3

In plain English

A medium-severity buffer overflow in cflow from GNU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 92.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12cflowno fix listedDEBIAN-CVE-2025-8736
Debian:13cflowno fix listedDEBIAN-CVE-2025-8736
Debian:14cflowno fix listedDEBIAN-CVE-2025-8736
Ubuntu:22.04:LTScflowno fix listedUBUNTU-CVE-2025-8736
Ubuntu:24.04:LTScflowno fix listedUBUNTU-CVE-2025-8736
Ubuntu:25.10cflowno fix listedUBUNTU-CVE-2025-8736
Ubuntu:26.04:LTScflowno fix listedUBUNTU-CVE-2025-8736
Ubuntu:26.10cflowno fix listedUBUNTU-CVE-2025-8736

Affected products (as reported)

VendorProductVersions
GNU cflow 1.01.11.21.31.41.51.61.7

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References