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CVE-2026-12969

Medium priority
Needs evaluation

An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 additional bytes exist...

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-12725

Medium priority
Needs evaluation

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past...

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-5172

Medium priority
Fixed

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.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-4893

Medium priority
Fixed

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-4892

Medium priority
Fixed

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.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-4891

Medium priority
Fixed

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.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-4890

Medium priority
Fixed

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.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-2291

Medium priority
Fixed

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.

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Fixed Fixed Fixed Fixed
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CVE-2026-6507

Medium priority
Fixed

A flaw was found in dnsmasq. A remote attacker could exploit an out-of-bounds write vulnerability by sending a specially crafted BOOTREPLY (Bootstrap Protocol Reply) packet to a dnsmasq server configured with...

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Fixed Not affected Not affected Not affected Not affected
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CVE-2020-37127

Low priority
Fixed

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the...

1 affected package

dnsmasq

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dnsmasq Not affected Not affected Fixed Fixed Fixed
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