https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Sat, 03 Oct 2026 17:11:17 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-369543 EUVD-2026-369543 https://cve.radiocsirt.org/vuln/euvd-2026-369543 https://cve.radiocsirt.org/vuln/fkie_cve-2026-77860 <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-77860 https://cve.radiocsirt.org/vuln/ghsa-8483-8qxh-jcf2 <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> https://cve.radiocsirt.org/vuln/ghsa-8483-8qxh-jcf2 https://cve.radiocsirt.org/vuln/msrc_cve-2026-77860 msrc_CVE-2026-77860 https://cve.radiocsirt.org/vuln/msrc_cve-2026-77860 https://cve.radiocsirt.org/vuln/opensuse-su-2026:11930-1 <p>libunbound8-1.26.1-1.1 on GA media</p> <p>libunbound8-1.26.1-1.1 on GA media</p> https://cve.radiocsirt.org/vuln/opensuse-su-2026:11930-1 https://cve.radiocsirt.org/vuln/rhsa-2026:68590 <p>unbound: Unbound: Denial of Service via &#39;serve-expired&#39; code path bypass unbound: Unbound: ZONEMD verification bypass due to asynchronous DNSSEC resolution unbound: Unbound: Denial of Service via use-after-free in DoQ stream output buffer unbound: Unbound: Denial of Service via continuous queries on TCP/DoT connection unbound: Unbound: Heap buffer overflow via malicious DNSSEC response unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis unbound: Unbound: Denial of Service via use-after-free in DoH stream cleanup unbound: Unbound: Denial of Service via algorithmic complexity attacks on DNSSEC</p> <p>unbound: Unbound: Denial of Service via &#39;serve-expired&#39; code path bypass unbound: Unbound: ZONEMD verification bypass due to asynchronous DNSSEC resolution unbound: Unbound: Denial of Service via use-after-free in DoQ stream output buffer unbound: Unbound: Denial of Service via continuous queries on TCP/DoT connection unbound: Unbound: Heap buffer overflow via malicious DNSSEC response unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis unbound: Unbound: Denial of Service via use-after-free in DoH stream cleanup unbound: Unbound: Denial of Service via algorithmic complexity attacks on DNSSEC</p> https://cve.radiocsirt.org/vuln/rhsa-2026:68590 https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-77860 <p><strong>Affected:</strong> Ubuntu:Pro:14.04:LTS: unbound, Ubuntu:Pro:16.04:LTS: unbound, Ubuntu:Pro:18.04:LTS: unbound, Ubuntu:Pro:20.04:LTS: unbound, Ubuntu:22.04:LTS: unbound, Ubuntu:24.04:LTS: unbound, Ubuntu:26.04:LTS: unbound</p> <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> <p><strong>Affected:</strong> Ubuntu:Pro:14.04:LTS: unbound, Ubuntu:Pro:16.04:LTS: unbound, Ubuntu:Pro:18.04:LTS: unbound, Ubuntu:Pro:20.04:LTS: unbound, Ubuntu:22.04:LTS: unbound, Ubuntu:24.04:LTS: unbound, Ubuntu:26.04:LTS: unbound</p> <p>In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the &#39;serve-expired&#39; code path can cause a double decrement on the &#39;wait-limit&#39; counter per client IP essentially bypassing one of the counter measures that was introduced for DNSBomb (CVE-2024-33655). A malicious actor can exploit this by controlling an authoritative zone with short TTL, so cached entries expire quickly. Each &#39;slow&#39; query, one the attacker&#39;s authoritative never answers, is followed by one query for an expired cached name, which is answered immediately via the &#39;serve-expired&#39; path and decrements the counter twice. This second query was named &#39;pump&#39;. By alternating slow queries and pumps, the attacker keeps the per-client counter at or below the configured &#39;wait-limit&#39; indefinitely, and can hold an arbitrary number of pending queries from a single source IP, up to the global mesh quota (num-queries-per-thread); eventually bypassing one of the counter measures introduced for DNSBomb (CVE-2024-33655). This vulnerability is present on the &#39;serve-expired&#39; code path.</p> https://cve.radiocsirt.org/vuln/ubuntu-cve-2026-77860 https://cve.radiocsirt.org/vuln/wid-sec-w-2026-3392 <p>Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Unbound ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Speicher zu korrumpieren, einen Denial of Service zu verursachen oder Code auszuführen.</p> <p>Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Unbound ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Speicher zu korrumpieren, einen Denial of Service zu verursachen oder Code auszuführen.</p> https://cve.radiocsirt.org/vuln/wid-sec-w-2026-3392