4.8
MEDIUM
CVSS 4.0
CVE-2025-12200
dnsmasq Config File option.c parse_dhcp_opt null pointer dereference
Description
Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: Based on the analysis by MITRE and review of community feedback, the reported conditions represent expected and intentional behavior within dnsmasq's documented design, rather than security vulnerabilities.
INFO
Published Date :
Oct. 27, 2025, 1:15 a.m.
Last Modified :
Nov. 3, 2025, 11:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
Update dnsmasq to a version that addresses the null pointer dereference vulnerability.
- Update dnsmasq to a version later than 2.73rc6.
- Apply vendor patches if available.
- Restrict local access to the affected system.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-12200 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-12200 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Nov. 03, 2025
Action Type Old Value New Value Removed Tag VulDB: disputed Changed Description A vulnerability was determined in dnsmasq up to 2.73rc6. Affected by this issue is the function parse_dhcp_opt of the file src/option.c of the component Config File Handler. This manipulation of the argument m causes null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way. Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: Based on the analysis by MITRE and review of community feedback, the reported conditions represent expected and intentional behavior within dnsmasq's documented design, rather than security vulnerabilities. Removed CVSS V4.0 VulDB: AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Removed CVSS V3.1 VulDB: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Removed CVSS V3.1 CISA-ADP: AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Removed CVSS V2 VulDB: (AV:L/AC:L/Au:S/C:N/I:N/A:P) Removed CWE VulDB: CWE-476 Removed CWE VulDB: CWE-404 Removed Reference VulDB: https://shimo.im/docs/5xkGoMo0WVfY4dkX/ Removed Reference VulDB: https://vuldb.com/?ctiid.329870 Removed Reference VulDB: https://vuldb.com/?id.329870 Removed Reference VulDB: https://vuldb.com/?submit.673155 Removed Reference CISA-ADP: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2025q4/018337.html Removed Reference CISA-ADP: https://www.openwall.com/lists/oss-security/2025/10/27/1 Removed Reference CVE: https://news.ycombinator.com/item?id=45727137 Removed Reference CVE: https://www.openwall.com/lists/oss-security/2025/10/27/1 -
CVE Rejected by [email protected]
Nov. 03, 2025
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 03, 2025
Action Type Old Value New Value Added Tag disputed Changed Description A vulnerability was determined in dnsmasq up to 2.73rc6. Affected by this issue is the function parse_dhcp_opt of the file src/option.c of the component Config File Handler. This manipulation of the argument m causes null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. A vulnerability was determined in dnsmasq up to 2.73rc6. Affected by this issue is the function parse_dhcp_opt of the file src/option.c of the component Config File Handler. This manipulation of the argument m causes null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The actual existence of this vulnerability is currently in question. This attack requires manipulating config files which might not be a realistic scenario in many cases. The vendor was contacted early about this disclosure but did not respond in any way. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 02, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H Added Reference https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2025q4/018337.html Added Reference https://www.openwall.com/lists/oss-security/2025/10/27/1 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Oct. 28, 2025
Action Type Old Value New Value Added Reference https://news.ycombinator.com/item?id=45727137 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Oct. 28, 2025
Action Type Old Value New Value Added Reference https://www.openwall.com/lists/oss-security/2025/10/27/1 -
New CVE Received by [email protected]
Oct. 27, 2025
Action Type Old Value New Value Added Description A vulnerability was determined in dnsmasq up to 2.73rc6. Affected by this issue is the function parse_dhcp_opt of the file src/option.c of the component Config File Handler. This manipulation of the argument m causes null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Added CVSS V2 (AV:L/AC:L/Au:S/C:N/I:N/A:P) Added CWE CWE-476 Added CWE CWE-404 Added Reference https://shimo.im/docs/5xkGoMo0WVfY4dkX/ Added Reference https://vuldb.com/?ctiid.329870 Added Reference https://vuldb.com/?id.329870 Added Reference https://vuldb.com/?submit.673155
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 4.8
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 4.4
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 1.7
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact