CVE-2026-4892 Details
Description
A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
A heap-based out-of-bounds write vulnerability has been identified in the DHCPv6 implementation of dnsmasq, an open-source networking tool that provides DNS forwarding, DHCP, and network boot services. This vulnerability allows local attackers to execute arbitrary code with root privileges by sending a crafted DHCPv6 packet. The issue arises from improper handling of memory, leading to potential exploitation by manipulating DHCPv6 traffic.
dnsmasq has released version 2.92rel2 to address this vulnerability. Users are advised to update to this version.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 11, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | redhat-SADP |
Affected Products
No affected product data is available for this CVE.
Change History
12 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 25, 2026 | CVE Modified | redhat-SADP |
| Aug 24, 2026 | CVE Modified | redhat-SADP |
| Jul 23, 2026 | CVE Modified | redhat-SADP |
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jul 2, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | CVE Modified | [email protected] |
| May 11, 2026 | New CVE Received | [email protected] |