CVE-2026-55991

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a remote unauthenticated client can trigger a libngtcp2 assertion if compiled with assertions on and terminate the entire Unbound process using a single DNS-over-QUIC DoQ connection and one normal DNS query. This is caused by an erroneous...

CVE-2026-41637

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, client terminated DNS-over-QUIC DoQ queries are not accounted properly by Unbound resulting in low-cost inflation of the waiting number of replies for already in-flight resolution queries. This results in degradation of resolution service f...

CVE-2026-32665

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, when downstream DNS-over-QUIC DoQ is enabled, the first two bidirectional streams on a new QUIC connection streamid 0 and 4 bypass the per-stream 'quic-size' gate entirely, and large input buffers are allocated later, after only the 2-byte...

CVE-2026-14586

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for...

CVE-2026-55991

CVE-2026-55991 affects NLnet Labs Unbound 1.22.0–1.25.1. A remote unauthenticated DoQ client can trigger a libngtcp2 assertion by passing an erroneous error value when ngtcp2_conn_writev_stream() returns NGTCP2_ERR_STREAM_DATA_BLOCKED and Unbound calls ngtcp2_ccerr_set_application_error() with -1...

CVE-2026-41637 Degradation of resolution service from improperly accounted client-terminated DNS-over-QUIC queries

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, client terminated DNS-over-QUIC DoQ queries are not accounted properly by Unbound resulting in low-cost inflation of the waiting number of replies for already in-flight resolution queries. This results in degradation of resolution service f...

CVE-2026-14586 Assertion in libngtcp2 when under pressure in high concurrency DNS-over-QUIC environments

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for...

CVE-2026-14586

CVE-2026-14586 affects NLnet Labs Unbound 1.22.0–1.25.1 in DNS-over-QUIC (DoQ) environments under high concurrency. The root cause is an assertion in libngtcp2 related to monotonic timestamps; Unbound used realtime, which can trigger an assertion in libngtcp2 for the QUIC timestamp, potentially t...

PT-2026-63372

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, client terminated DNS-over-QUIC DoQ queries are not accounted properly by Unbound resulting in low-cost inflation of the waiting number of replies for already in-flight resolution queries. This results in degradation of resolution service f...

libngtcp2-16-1.22.1-1.1 on GA media (moderate)

libngtcp2-16-1.22.1-1.1 on GA media Announcement ID: openSUSE-SU-2026:10621-1 Rating: moderate Cross-References: CVE-2026-40170 CVSS scores: CVE-2026-40170 SUSE : 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-40170 SUSE : 8.7...

OPENSUSE-SU-2026:10621-1 libngtcp2-16-1.22.1-1.1 on GA media

These are all security issues fixed in the libngtcp2-16-1.22.1-1.1 package on the GA media of openSUSE Tumbleweed...

SUSE-SU-2025:20126-1 Security update for unbound

This update for unbound fixes the following issues: - Update to 1.22.0: Features: Add iter-scrub-ns, iter-scrub-cname and max-global-quota configuration options. Merge patch to fix for glue that is outside of zone, with harden-unverified-glue, from Karthik Umashankar Microsoft. Enabling this opti...

libngtcp2-16-1.10.0-1.1 on GA media (moderate)

libngtcp2-16-1.10.0-1.1 on GA media Announcement ID: openSUSE-SU-2025:14766-1 Rating: moderate Cross-References: CVE-2024-52811 Affected Products: openSUSE Tumbleweed An update that solves one vulnerability can now be installed. Description: These are all security issues fixed in the...

OPENSUSE-SU-2025:14766-1 libngtcp2-16-1.10.0-1.1 on GA media

These are all security issues fixed in the libngtcp2-16-1.10.0-1.1 package on the GA media of openSUSE Tumbleweed...