Packages
- unbound - validating, recursive, caching DNS resolver
Details
Yuqi Qiu and Xiang Li discovered that Unbound did not correctly handle
certain memory operations. An attacker could possibly use this issue to
cause a denial of service or execute arbitrary code. (CVE-2026-81642)
Ben Morris discovered that Unbound did not correctly handle certain
memory operations. An attacker could possibly use this issue to cause a
denial of service or execute arbitary code. (CVE-2026-82717)
Yuqi Qiu and Xiang Li discovered that Unbound did not correctly handle
certain memory operations. An attacker could possibly use this issue to
cause a denial of service or execute arbitrary code. (CVE-2026-81642)
Ben Morris discovered that Unbound did not correctly handle certain
memory operations. An attacker could possibly use this issue to cause a
denial of service or execute arbitary code. (CVE-2026-82717)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | libunbound8 – 1.24.2-1ubuntu2.3 | ||
| python3-unbound – 1.24.2-1ubuntu2.3 | |||
| unbound – 1.24.2-1ubuntu2.3 | |||
| 24.04 LTS noble | libunbound8 – 1.19.2-1ubuntu3.10 | ||
| python3-unbound – 1.19.2-1ubuntu3.10 | |||
| unbound – 1.19.2-1ubuntu3.10 | |||
| 22.04 LTS jammy | libunbound8 – 1.13.1-1ubuntu5.16 | ||
| python3-unbound – 1.13.1-1ubuntu5.16 | |||
| unbound – 1.13.1-1ubuntu5.16 | |||
| 20.04 LTS focal | libunbound8 – 1.9.4-2ubuntu1.11+esm2 | ||
| python-unbound – 1.9.4-2ubuntu1.11+esm2 | |||
| python3-unbound – 1.9.4-2ubuntu1.11+esm2 | |||
| unbound – 1.9.4-2ubuntu1.11+esm2 | |||
| 18.04 LTS bionic | libunbound2 – 1.6.7-1ubuntu2.6+esm5 | ||
| python-unbound – 1.6.7-1ubuntu2.6+esm5 | |||
| python3-unbound – 1.6.7-1ubuntu2.6+esm5 | |||
| unbound – 1.6.7-1ubuntu2.6+esm5 | |||
| 16.04 LTS xenial | libunbound2 – 1.5.8-1ubuntu1.1+esm4 | ||
| python-unbound – 1.5.8-1ubuntu1.1+esm4 | |||
| unbound – 1.5.8-1ubuntu1.1+esm4 | |||
| 14.04 LTS trusty | libunbound2 – 1.4.22-1ubuntu4.14.04.3+esm4 | ||
| python-unbound – 1.4.22-1ubuntu4.14.04.3+esm4 | |||
| unbound – 1.4.22-1ubuntu4.14.04.3+esm4 | |||
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