CVE Feed

    Dashboard / CVE / CVE-2026-2291

    CVE-2026-2291

    dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.

    Published:May 9, 2026
    Last Modified:May 13, 2026
    EPS:May 11, 2026
    EPSS Score:0.0003
    CVSS Score:7.3

    Affected Products

    Vendor
    Dnsmasq
    Product
    Dnsmasq

    Exploits

    https://github.com/JianrongXiao-Linksys/dnsmasq-cve-2026

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-100 Overflow Buffers
    CAPEC-47 Buffer Overflow via Parameter Expansion

    Related CVEs

    CVE-2026-12969 (CVSS 5.3) — An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS …
    CVE-2026-12725 (CVSS 5.9) — A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, …
    CVE-2026-4892 (CVSS 8.4) — A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers …
    CVE-2026-5172 (CVSS 7.3) — A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds…
    CVE-2026-4891 (CVSS 5.3) — A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to c…
    CVE-2026-4893 (CVSS 5.3) — An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a craft…
    CVE-2026-4890 (CVSS 7.5) — A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a…
    CVE-2020-37127 (CVSS 6.9) — Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attacker…
    CVE-2025-12200 (CVSS 3.3) — ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its C…
    CVE-2025-12199 (CVSS 3.3) — ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its C…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High