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Threats Tagged 'cve-2026-42944'

View all threats tagged with 'cve-2026-42944'. Filter and sort to focus on specific types of threats.

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Active filters (1):Tag: cve-2026-42944

Threats Tagged 'cve-2026-42944'

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A heap overflow vulnerability exists in Unbound DNS resolver when processing multiple NSID, cookie, and padding EDNS options. This flaw can cause the Unbound service to crash, resulting in denial of service (DoS). The vulnerability affects certain versions of Unbound as shipped by Red Hat. No mitigation is currently available that meets Red Hat's criteria for ease of use and stability.

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This update includes the following RPMs: unbound: * python3-unbound-1.25.1-1.hum1 (aarch64, x86_64) * unbound-1.25.1-1.hum1 (aarch64, x86_64) * unbound-anchor-1.25.1-1.hum1 (aarch64, x86_64) * unbound-devel-1.25.1-1.hum1 (aarch64, x86_64) * unbound-dracut-1.25.1-1.hum1 (aarch64, x86_64) * unbound-libs-1.25.1-1.hum1 (aarch64, x86_64) * unbound-munin-1.25.1-1.hum1 (noarch) * unbound-utils-1.25.1-1.hum1 (aarch64, x86_64) * unbound-1.25.1-1.hum1.src (src)

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This update includes the following RPMs: unbound: * python3-unbound-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-anchor-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-devel-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-dracut-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-libs-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-munin-1.25.1-0.1.hum1 (noarch) * unbound-utils-1.25.1-0.1.hum1 (aarch64, x86_64) * unbound-1.25.1-0.1.hum1.src (src)

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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 enabled for the vulnerability to be exploited. An adversary who can query Unbound can exploit the vulnerability by attaching multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options to the query. A flaw in the size calculation of the EDNS field truncates the correct value which allows the encoder to overflow the available space when writing. Those two combined lead to a heap overflow write of Unbound controlled data and eventually a crash. Unbound 1.25.1 contains a patch with a fix to de-duplicate the EDNS options and a fix to prevent truncation of the EDNS field size calculation.

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