Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Unbound vulnerabilities (USN-8282-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8282-1 advisory. Andrew Griffiths discovered that Unbound did not properly handle certain DNSCrypt packets. A remote attacker could possib...

Malicious code in bolt-delivery-menu-app (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector cc39247db76b4edd80084e400324518739f141dafda621d368c3e5a9ac41f791 Package executes a DNS-based beacon at both install time package.json scripts.install runs node index.js and on every require of the module...

unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options

A flaw was found in Unbound, a Domain Name System DNS resolver. A remote attacker could trigger a heap overflow by sending specially crafted DNS reply packets. This occurs when Unbound attempts to encode multiple Name Server Identifier NSID or Extension Mechanisms for DNS EDNS Cookie options, or...

unbound: Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution

A flaw was discovered in Unbound’s DNSSEC validator can leave it using an invalid memory pointer after certain DS sub-query validations fail due to NSEC3 budget exhaustion. This may cause crashes and could potentially allow arbitrary code execution...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

MAL-2026-4662 Malicious code in rendezvous-js (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector 5b4a03eaa6b09e5b9e291dd450f58e49a639c3efd8fa952f5ac48f9aea04aba4 On npm install scripts.install runs node index.js and on require'rendezvous-js', lib/core.js collects os.userInfo.username, os.hostname, and the...

CVE-2026-3039

BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets. Typically these servers will be found in Active Directory integrated DNS deployments and/or...

CVE-2026-3593

A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected...

CVE-2026-3592

BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0...

Malicious code in banana-stand (npm)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector ab14273a518e66f357d229806e82cb2f4ce211cae4bc5de0f2d15eeab67fb720 On npm install, the package's install lifecycle hook runs node index.js, which loads lib/core.js. That module reads os.userInfo.username, os.hostname...

CVE-2026-5950 Unbounded resend loop in BIND 9 resolver

An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 throu...

CVE-2026-5947

CVE-2026-5947 describes an undefined behavior due to a race condition in SIG(0) validation during DNS message processing under load. Affected are BIND 9.20.0–9.20.22, 9.21.0–9.21.21, and 9.20.9-S1–9.20.22-S1; versions 9.18.28–9.18.49 and 9.18.28-S1–9.18.49-S1 are not affected. Under a query flood...

CVE-2026-5946 Invalid handling of CLASS != IN

Multiple flaws have been identified in named related to the handling of DNS messages whose CLASS is not Internet IN — for example, CHAOS or HESIOD, or DNS messages that specify meta-classes ANY or NONE in the question section. Specially crafted requests reaching the affected code paths — recursio...

CVE-2026-3593

A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected...

CVE-2026-42959

NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate write offsets fo...

CVE-2026-42959

NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate write offsets fo...

ALPINE-CVE-2026-33278

NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary can exploit the...

EUVD-2026-31085

NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options 'nsid', 'answer-cookie', 'pad-responses' default need to be enabl...

CVE-2026-42944

NLnet Labs Unbound 1.14.0–1.25.0 is affected by a heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in replies. The vulnerability requires the options (nsid, answer-cookie, pad-responses) to be enabled, and a querier can trigger the overflow by attaching...

CVE-2026-42923

NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the DNSSEC validator where the code path to consult the negative cache for DS records does not take into account the limit on NSEC3 hash calculations introduced in 1.19.1. This leads to degradation of service during the...