CVE-2026-19941
checkwildcard() accepts an out-of-zone NSEC as a wildcard-nonexistence proof
CVE-2026-19941 is fixed in 35 products on 1 platform, first by bind9 1:9.11.3+dfsg-1ubuntu1.19+esm6, released September 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.9
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0023
13th percentile
An inapplicable NSEC record may be accepted by a `named` resolver as proof that no wildcard exists, which could allow an attacker at the same or an upstream level of the zone name to mask the existence of a victim's wildcard record. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bind · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind · opensuse-leap 16.0 | 9.20.29-160000.1.1 | OPENSUSE-SU-2026:22049-1 | Oct 7, 2026 |
| bind · sles 15.6 | 9.18.50-150600.3.35.1 | SUSE-SU-2026:4608-1 | Nov 7, 2026 |
| bind · sles 15.7 | 9.20.29-150700.3.32.2 | SUSE-SU-2026:4285-1 | Sep 22, 2026 |
| bind · sles 16.0 | 9.20.29-160000.1.1 | SUSE-SU-2026:24157-1 | Oct 7, 2026 |
| bind-chroot · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-chroot · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-debuginfo · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-debugsource · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-debugsource · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-devel · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-devel · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-dnssec-utils · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-dnssec-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-dnssec-utils-debuginfo · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-dnssec-utils-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-doc · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-doc · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-dyndb-ldap · Fedora 43 | 11.11-15.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-dyndb-ldap-debuginfo · Fedora 43 | 11.11-15.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-dyndb-ldap-debugsource · Fedora 43 | 11.11-15.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-libs · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-libs · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-libs-debuginfo · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-libs-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-license · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-utils · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-utils-debuginfo · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-utils-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind9 · Debian 12.15 (bookworm) | 1:9.18.49-1~deb12u3 | DEBIAN-CVE-2026-19941 | Sep 19, 2026 |
| bind9 · Debian 13.5 (trixie) | 1:9.20.29-1~deb13u1 | DEBIAN-CVE-2026-19941 | Sep 19, 2026 |
| bind9 · Debian 14 | 1:9.20.29-1 | DEBIAN-CVE-2026-19941 | Sep 19, 2026 |
| bind9 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | bind9 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| bind9 · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9 · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9 · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| bind9 · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.4 | bind9 1:9.20.24-1ubuntu0.4 | Sep 16, 2026 |
| bind9-dnsutils · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9-dnsutils 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9-dnsutils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9-dnsutils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9-dnsutils 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| bind9-dnsutils · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.4 | bind9-dnsutils 1:9.20.24-1ubuntu0.4 | Sep 16, 2026 |
| bind9-host · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | bind9-host 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| bind9-host · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9-host 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9-host · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9-host 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9-host · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9-host 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| bind9-host · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.4 | bind9-host 1:9.20.24-1ubuntu0.4 | Sep 16, 2026 |
| bind9-libs · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9-libs 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9-libs · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9-libs 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9-libs · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9-libs 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| bind9-libs · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.4 | bind9-libs 1:9.20.24-1ubuntu0.4 | Sep 16, 2026 |
| bind9-utils · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9-utils 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9-utils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9-utils 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9-utils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9-utils 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| bind9-utils · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.4 | bind9-utils 1:9.20.24-1ubuntu0.4 | Sep 16, 2026 |
| bind9utils · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | bind9utils 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| bind9utils · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | bind9utils 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| bind9utils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | bind9utils 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| bind9utils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | bind9utils 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| dnsutils · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | dnsutils 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| dnsutils · Ubuntu 20.04 LTS (focal) | 1:9.18.30-0ubuntu0.20.04.2+esm3 | dnsutils 1:9.18.30-0ubuntu0.20.04.2+esm3 | Sep 16, 2026 |
| dnsutils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.7 | dnsutils 1:9.18.39-0ubuntu0.22.04.7 | Sep 16, 2026 |
| dnsutils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.8 | dnsutils 1:9.18.39-0ubuntu0.24.04.8 | Sep 16, 2026 |
| libbind9-160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libbind9-160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libdns-export1100 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libdns-export1100 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libdns1100 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libdns1100 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libirs-export160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libirs-export160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libirs160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libirs160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisc-export169 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisc-export169 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisc169 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisc169 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisccc-export160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisccc-export160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisccc160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisccc160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisccfg-export160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisccfg-export160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| libisccfg160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | libisccfg160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
| liblwres160 · Ubuntu 18.04.6 LTS (bionic) | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | liblwres160 1:9.11.3+dfsg-1ubuntu1.19+esm6 | Sep 16, 2026 |
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