CVE-2026-81563
SVCB AliasMode additional-data error leaks qpcache references
CVE-2026-81563 is fixed in 30 products on 1 platform, first by RHSA-2026:94115, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0057
47th percentile
A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-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 · RHEL 10 | 9.18.33-4.el10_0.6 | RHSA-2026:94115 | Jun 24, 2026 |
| bind · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 2026 |
| bind · opensuse-leap 16.0 | 9.20.29-160000.1.1 | OPENSUSE-SU-2026:22049-1 | Oct 7, 2026 |
| bind · rocky 10 | 2:9.18.33-15.el10_2.12 | RLSA-2026:75577 | Oct 6, 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 · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-chroot · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-chroot · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 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 · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-devel · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-devel · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 2026 |
| bind-dnssec-utils · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-dnssec-utils · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-dnssec-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-dnssec-utils · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 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 · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-doc · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-doc · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 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 · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-libs · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-libs · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 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 · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-license · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-license · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 2026 |
| bind-utils · Fedora 43 | 32:9.18.51^git20261003.d0a87358-2.fc43 | FEDORA-2026-ABA85B9A89 | Nov 7, 2026 |
| bind-utils · almalinux 10 | 32:9.18.33-15.el10_2.12 | ALSA-2026:75577 | Oct 5, 2026 |
| bind-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.3 | ALAS2023-2026-3137 | Sep 28, 2026 |
| bind-utils · ol 10 | 32:9.18.33-15.0.1.el10_2.12 | ELSA-2026-75577 | Oct 5, 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-2026-81563 | Sep 18, 2026 |
| bind9 · Debian 13.5 (trixie) | 1:9.20.29-1~deb13u1 | DEBIAN-CVE-2026-81563 | Sep 18, 2026 |
| bind9 · Debian 14 | 1:9.20.29-1 | DEBIAN-CVE-2026-81563 | Sep 18, 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 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 |
| bind9.18 · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18 · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18 · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18 · rocky 9 | 2:9.18.29-14.el9_8.10 | RLSA-2026:75578 | Oct 6, 2026 |
| bind9.18-chroot · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-chroot · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-chroot · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18-devel · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-devel · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-devel · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18-dnssec-utils · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-dnssec-utils · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-dnssec-utils · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18-doc · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-doc · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-doc · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18-libs · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-libs · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-libs · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 2026 |
| bind9.18-utils · RHEL 9 | 32:9.18.29-14.el9_8.10 | RHSA-2026:75578 | Oct 5, 2026 |
| bind9.18-utils · almalinux 9 | 32:9.18.29-14.el9_8.10 | ALSA-2026:75578 | Oct 5, 2026 |
| bind9.18-utils · ol 9 | 32:9.18.29-14.el9_8.10 | ELSA-2026-75578 | Oct 5, 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 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 |
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