PT-2025-43757 · Dnsmasq · Dnsmasq

Zh_Vul · Published 2025-10-27 · Updated 2025-11-02 · CVE-2025-12199

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions dnsmasq versions up to 2.73rc6

Description A flaw exists in dnsmasq that involves a null pointer dereference within the check servers function, located in the src/network.c file of the Config File Handler component. This issue can be triggered through local exploitation. The exploit for this issue has been publicly released, and attempts to notify the vendor were unsuccessful.

Recommendations Versions prior to 2.73rc6 should be used.

Exploit

Fix

NULL Pointer Dereference

Improper Resource Release

Weakness Enumeration

CWE-476

CWE-404

Related Identifiers

CVE-2025-12199

Affected Products

Dnsmasq

References · 19

• 🔥 https://shimo.im/docs/ZzkLMVMN7vIYJBAQ · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-12199 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-12199 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-12199 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-12199 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-12199 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-12199 · Security Note
• https://t.me/cveNotify/140587 · Telegram Post
• https://vuldb.com/?submit.673154 · Note
• https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2025q4/018337.html · Note
• https://twitter.com/CVEnew/status/1982642924774212021 · Twitter Post
• https://vuldb.com/?id.329869 · Note
• https://t.me/CVEtracker/35770 · Telegram Post
• https://openwall.com/lists/oss-security/2025/10/27/1 · Note
• https://vuldb.com/?ctiid.329869 · Note