CVE-2025-12198

A vulnerability has been found in dnsmasq up to 2.73rc6. Affected is the function parse_hex of the file src/util.c of the component Config File Handler. The manipulation of the argument i leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 3.1 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://shimo.im/docs/1d3aMVMmNmiLjg3g/
https://vuldb.com/?ctiid.329868
https://vuldb.com/?id.329868
https://vuldb.com/?submit.673138
https://news.ycombinator.com/item?id=45727137
https://www.openwall.com/lists/oss-security/2025/10/27/1
https://shimo.im/docs/1d3aMVMmNmiLjg3g

Configurations

No configuration.

History

28 Oct 2025, 16:15

Type	Values Removed	Values Added
References		() https://shimo.im/docs/1d3aMVMmNmiLjg3g -

28 Oct 2025, 02:15

Type	Values Removed	Values Added
References		() https://news.ycombinator.com/item?id=45727137 -

28 Oct 2025, 01:16

Type	Values Removed	Values Added
References		() https://www.openwall.com/lists/oss-security/2025/10/27/1 -

27 Oct 2025, 01:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-10-27 01:15

Updated : 2025-10-28 16:15

NVD link : CVE-2025-12198

Mitre link : CVE-2025-12198

CVE.ORG link : CVE-2025-12198

JSON object : View

Products Affected

No product.

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-122

Heap-based Buffer Overflow

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