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6 vulnerabilities found for dnsmasq by dnsmasq
CVE-2026-5172 (GCVE-0-2026-5172)
Vulnerability from cvelistv5
Published
2026-05-11 16:48
Modified
2026-08-25 12:05
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
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CVE-2026-4893 (GCVE-0-2026-4893)
Vulnerability from cvelistv5
Published
2026-05-11 16:48
Modified
2026-05-20 14:09
Severity ?
VLAI Severity ?
EPSS score ?
Summary
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
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CVE-2026-4892 (GCVE-0-2026-4892)
Vulnerability from cvelistv5
Published
2026-05-11 16:47
Modified
2026-08-25 12:05
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
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CVE-2026-4891 (GCVE-0-2026-4891)
Vulnerability from cvelistv5
Published
2026-05-11 16:47
Modified
2026-08-25 12:05
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
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CVE-2026-4890 (GCVE-0-2026-4890)
Vulnerability from cvelistv5
Published
2026-05-11 16:47
Modified
2026-08-25 12:05
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
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CVE-2026-2291 (GCVE-0-2026-2291)
Vulnerability from cvelistv5
Published
2026-05-11 16:47
Modified
2026-07-20 20:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
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"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
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"url": "https://www.kb.cert.org/vuls/id/471747"
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"url": "https://thekelleys.org.uk/dnsmasq/CVE/"
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"url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
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{
"url": "https://github.com/NixOS/nixpkgs/pull/519082"
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{
"url": "https://github.com/NixOS/nixpkgs/pull/519093"
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"url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
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