CVE-2026-42960
Possible cache poisoning via promiscuous records for the authority section
CVE-2026-42960 is fixed in 17 products on 1 platform, first by libunbound2 1.6.7-1ubuntu2.6+esm4, released May 19, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
10.0
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0026
18th percentile
Possible cache poisoning attack while following delegation (bsc#1265588).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libunbound2 · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | libunbound2 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| libunbound8 · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | libunbound8 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| libunbound8 · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.15 | libunbound8 1.13.1-1ubuntu5.15 | May 27, 2026 |
| libunbound8 · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.8 | libunbound8 1.19.2-1ubuntu3.8 | May 27, 2026 |
| libunbound8 · Ubuntu 25.10 (questing) | 1.22.0-2ubuntu2.3 | libunbound8 1.22.0-2ubuntu2.3 | May 27, 2026 |
| libunbound8 · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.1 | libunbound8 1.24.2-1ubuntu2.1 | May 19, 2026 |
| python-unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | python-unbound 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| python-unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | python-unbound 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| python3-unbound · RHEL 9 | 0:1.26.1-1.el9_9 | RHSA-2026:97497 | Nov 11, 2026 |
| python3-unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | python3-unbound 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| python3-unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | python3-unbound 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| python3-unbound · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.15 | python3-unbound 1.13.1-1ubuntu5.15 | May 27, 2026 |
| python3-unbound · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.8 | python3-unbound 1.19.2-1ubuntu3.8 | May 27, 2026 |
| python3-unbound · Ubuntu 25.10 (questing) | 1.22.0-2ubuntu2.3 | python3-unbound 1.22.0-2ubuntu2.3 | May 27, 2026 |
| python3-unbound · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.1 | python3-unbound 1.24.2-1ubuntu2.1 | May 19, 2026 |
| python3-unbound · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| python3-unbound-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound · Debian 13.5 (trixie) | 1.22.0-2+deb13u3 | DEBIAN-CVE-2026-42960 | May 27, 2026 |
| unbound · Debian 14 | 1.25.1-1 | DEBIAN-CVE-2026-42960 | May 27, 2026 |
| unbound · RHEL 10 | 1.26.1-2.el10_3 | RHSA-2026:97121 | May 20, 2026 |
| unbound · RHEL 9 | 0:1.26.1-1.el9_9 | RHSA-2026:97497 | Nov 11, 2026 |
| unbound · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | unbound 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| unbound · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | unbound 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| unbound · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.15 | unbound 1.13.1-1ubuntu5.15 | May 27, 2026 |
| unbound · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.8 | unbound 1.19.2-1ubuntu3.8 | May 27, 2026 |
| unbound · Ubuntu 25.10 (questing) | 1.22.0-2ubuntu2.3 | unbound 1.22.0-2ubuntu2.3 | May 27, 2026 |
| unbound · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.1 | unbound 1.24.2-1ubuntu2.1 | May 19, 2026 |
| unbound · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound · opensuse-leap 16.0 | 1.24.1-160000.2.1 | OPENSUSE-SU-2026:21083-1 | Jun 18, 2026 |
| unbound · sles 16.0 | 1.24.1-160000.2.1 | SUSE-SU-2026:22160-1 | Jun 18, 2026 |
| unbound-anchor · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | unbound-anchor 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| unbound-anchor · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | unbound-anchor 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| unbound-anchor · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.15 | unbound-anchor 1.13.1-1ubuntu5.15 | May 27, 2026 |
| unbound-anchor · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.8 | unbound-anchor 1.19.2-1ubuntu3.8 | May 27, 2026 |
| unbound-anchor · Ubuntu 25.10 (questing) | 1.22.0-2ubuntu2.3 | unbound-anchor 1.22.0-2ubuntu2.3 | May 27, 2026 |
| unbound-anchor · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.1 | unbound-anchor 1.24.2-1ubuntu2.1 | May 19, 2026 |
| unbound-anchor · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-anchor-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-debugsource · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-devel · RHEL 9 | 0:1.26.1-1.el9_9 | RHSA-2026:97497 | Nov 11, 2026 |
| unbound-devel · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-dracut · RHEL 9 | 0:1.26.1-1.el9_9 | RHSA-2026:97497 | Nov 11, 2026 |
| unbound-host · Ubuntu 18.04.6 LTS (bionic) | 1.6.7-1ubuntu2.6+esm4 | unbound-host 1.6.7-1ubuntu2.6+esm4 | May 19, 2026 |
| unbound-host · Ubuntu 20.04 LTS (focal) | 1.9.4-2ubuntu1.11+esm1 | unbound-host 1.9.4-2ubuntu1.11+esm1 | May 19, 2026 |
| unbound-host · Ubuntu 22.04.1 LTS (jammy) | 1.13.1-1ubuntu5.15 | unbound-host 1.13.1-1ubuntu5.15 | May 27, 2026 |
| unbound-host · Ubuntu 24.04.5 LTS (noble) | 1.19.2-1ubuntu3.8 | unbound-host 1.19.2-1ubuntu3.8 | May 27, 2026 |
| unbound-host · Ubuntu 25.10 (questing) | 1.22.0-2ubuntu2.3 | unbound-host 1.22.0-2ubuntu2.3 | May 27, 2026 |
| unbound-host · Ubuntu 26.04.1 LTS (resolute) | 1.24.2-1ubuntu2.1 | unbound-host 1.24.2-1ubuntu2.1 | May 19, 2026 |
| unbound-libs · RHEL 9 | 0:1.26.1-1.el9_9 | RHSA-2026:97497 | Nov 11, 2026 |
| unbound-libs · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-libs-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-utils · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
| unbound-utils-debuginfo · amzn 2023 | 1.17.1-1.amzn2023.0.12 | ALAS2023-2026-1756 | May 25, 2026 |
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