CVE-2026-82717
CNAME synthesis could lead to heap corruption
CVE-2026-82717 is fixed in 17 products on 1 platform, first by libunbound8 1.24.2-1ubuntu2.3, released September 16, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0078
56th percentile
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fix(es): * unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis (CVE-2026-82717) * unbound: Unbound: Heap buffer overflow via malicious DNSSEC response (CVE-2026-81634) * unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY (CVE-2026-81642) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libunbound2 · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | libunbound2 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| libunbound8 · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | libunbound8 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| libunbound8 · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.16 | libunbound8 1.13.1-1ubuntu5.16 | Oct 6, 2026 |
| libunbound8 · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.10 | libunbound8 1.19.2-1ubuntu3.10 | Oct 6, 2026 |
| libunbound8 · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.3 | libunbound8 1.24.2-1ubuntu2.3 | Sep 16, 2026 |
| python-unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | python-unbound 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| python-unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | python-unbound 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| python3-unbound · RHEL 8 | 0:1.16.2-5.14.el8_10.4 | RHSA-2026:70754 | Sep 23, 2026 |
| python3-unbound · RHEL 9 | 0:1.24.2-3.el9_8.8 | RHSA-2026:71487 | Sep 24, 2026 |
| python3-unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | python3-unbound 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| python3-unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | python3-unbound 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| python3-unbound · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.16 | python3-unbound 1.13.1-1ubuntu5.16 | Oct 6, 2026 |
| python3-unbound · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.10 | python3-unbound 1.19.2-1ubuntu3.10 | Oct 6, 2026 |
| python3-unbound · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.3 | python3-unbound 1.24.2-1ubuntu2.3 | Sep 16, 2026 |
| python3-unbound · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| python3-unbound · almalinux 8 | 1.16.2-5.14.el8_10.4 | ALSA-2026:70754 | Sep 23, 2026 |
| python3-unbound · almalinux 9 | 1.24.2-3.el9_8.8 | ALSA-2026:71487 | Sep 24, 2026 |
| python3-unbound · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| python3-unbound · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| python3-unbound · ol 8 | 0:1.16.2-5.14.el8_10.4 | ELSA-2026-70754 | Sep 24, 2026 |
| python3-unbound · ol 9 | 0:1.24.2-3.el9_8.8 | ELSA-2026-71487 | Sep 24, 2026 |
| python3-unbound-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound · Debian 13.5 (trixie) | 1.26.1-0+deb13u1 | DEBIAN-CVE-2026-82717 | Sep 19, 2026 |
| unbound · Debian 14 | 1.26.1-1 | DEBIAN-CVE-2026-82717 | Sep 19, 2026 |
| unbound · RHEL 10 | 1.24.2-7.el10_2.6 | RHSA-2026:71419 | Sep 24, 2026 |
| unbound · RHEL 8 | 0:1.16.2-5.14.el8_10.4 | RHSA-2026:70754 | Sep 23, 2026 |
| unbound · RHEL 9 | 0:1.24.2-3.el9_8.8 | RHSA-2026:71487 | Sep 24, 2026 |
| unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | unbound 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | unbound 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| unbound · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.16 | unbound 1.13.1-1ubuntu5.16 | Oct 6, 2026 |
| unbound · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.10 | unbound 1.19.2-1ubuntu3.10 | Oct 6, 2026 |
| unbound · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.3 | unbound 1.24.2-1ubuntu2.3 | Sep 16, 2026 |
| unbound · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound · almalinux 8 | 1.16.2-5.14.el8_10.4 | ALSA-2026:70754 | Sep 23, 2026 |
| unbound · almalinux 9 | 1.24.2-3.el9_8.8 | ALSA-2026:71487 | Sep 24, 2026 |
| unbound · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound · ol 8 | 0:1.16.2-5.14.el8_10.4 | ELSA-2026-70754 | Sep 24, 2026 |
| unbound · ol 9 | 0:1.24.2-3.el9_8.8 | ELSA-2026-71487 | Sep 24, 2026 |
| unbound · opensuse-leap 16.0 | 1.26.1-160000.1.1 | OPENSUSE-SU-2026:22082-1 | Nov 7, 2026 |
| unbound · rocky 10 | 0:1.24.2-7.el10_2.6 | RLSA-2026:71419 | Sep 25, 2026 |
| unbound · rocky 8 | 0:1.16.2-5.14.el8_10.4 | RLSA-2026:70754 | Sep 24, 2026 |
| unbound · rocky 9 | 0:1.24.2-3.el9_8.8 | RLSA-2026:71487 | Sep 25, 2026 |
| unbound · sles 15.6 | 1.26.1-150600.23.24.1 | SUSE-SU-2026:4620-1 | Nov 7, 2026 |
| unbound · sles 15.7 | 1.26.1-150600.23.24.1 | SUSE-SU-2026:4620-1 | Nov 7, 2026 |
| unbound · sles 16.0 | 1.26.1-160000.1.1 | SUSE-SU-2026:24226-1 | Nov 7, 2026 |
| unbound-anchor · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | unbound-anchor 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| unbound-anchor · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | unbound-anchor 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| unbound-anchor · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.16 | unbound-anchor 1.13.1-1ubuntu5.16 | Oct 6, 2026 |
| unbound-anchor · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.10 | unbound-anchor 1.19.2-1ubuntu3.10 | Oct 6, 2026 |
| unbound-anchor · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.3 | unbound-anchor 1.24.2-1ubuntu2.3 | Sep 16, 2026 |
| unbound-anchor · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound-anchor · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-anchor · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound-anchor-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-debugsource · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-devel · RHEL 8 | 0:1.16.2-5.14.el8_10.4 | RHSA-2026:70754 | Sep 23, 2026 |
| unbound-devel · RHEL 9 | 0:1.24.2-3.el9_8.8 | RHSA-2026:71487 | Sep 24, 2026 |
| unbound-devel · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound-devel · almalinux 8 | 1.16.2-5.14.el8_10.4 | ALSA-2026:70754 | Sep 23, 2026 |
| unbound-devel · almalinux 9 | 1.24.2-3.el9_8.8 | ALSA-2026:71487 | Sep 24, 2026 |
| unbound-devel · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-devel · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound-devel · ol 8 | 0:1.16.2-5.14.el8_10.4 | ELSA-2026-70754 | Sep 24, 2026 |
| unbound-devel · ol 9 | 0:1.24.2-3.el9_8.8 | ELSA-2026-71487 | Sep 24, 2026 |
| unbound-dracut · RHEL 9 | 0:1.24.2-3.el9_8.8 | RHSA-2026:71487 | Sep 24, 2026 |
| unbound-dracut · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound-dracut · almalinux 9 | 1.24.2-3.el9_8.8 | ALSA-2026:71487 | Sep 24, 2026 |
| unbound-dracut · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound-dracut · ol 9 | 0:1.24.2-3.el9_8.8 | ELSA-2026-71487 | Sep 24, 2026 |
| unbound-host · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm5 | unbound-host 1.6.7-1ubuntu2.6+esm5 | Oct 6, 2026 |
| unbound-host · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm2 | unbound-host 1.9.4-2ubuntu1.11+esm2 | Oct 6, 2026 |
| unbound-host · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.16 | unbound-host 1.13.1-1ubuntu5.16 | Oct 6, 2026 |
| unbound-host · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.10 | unbound-host 1.19.2-1ubuntu3.10 | Oct 6, 2026 |
| unbound-host · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.3 | unbound-host 1.24.2-1ubuntu2.3 | Sep 16, 2026 |
| unbound-libs · RHEL 8 | 0:1.16.2-5.14.el8_10.4 | RHSA-2026:70754 | Sep 23, 2026 |
| unbound-libs · RHEL 9 | 0:1.24.2-3.el9_8.8 | RHSA-2026:71487 | Sep 24, 2026 |
| unbound-libs · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound-libs · almalinux 8 | 1.16.2-5.14.el8_10.4 | ALSA-2026:70754 | Sep 23, 2026 |
| unbound-libs · almalinux 9 | 1.24.2-3.el9_8.8 | ALSA-2026:71487 | Sep 24, 2026 |
| unbound-libs · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-libs · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound-libs · ol 8 | 0:1.16.2-5.14.el8_10.4 | ELSA-2026-70754 | Sep 24, 2026 |
| unbound-libs · ol 9 | 0:1.24.2-3.el9_8.8 | ELSA-2026-71487 | Sep 24, 2026 |
| unbound-libs-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-utils · almalinux 10 | 1.24.2-7.el10_2.6 | ALSA-2026:71419 | Sep 24, 2026 |
| unbound-utils · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
| unbound-utils · ol 10 | 0:1.24.2-7.el10_2.6 | ELSA-2026-71419 | Sep 24, 2026 |
| unbound-utils-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.15 | ALAS2023-2026-3127 | Sep 28, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.