UBUNTU-CVE-2026-11605
- Source
- https://ubuntu.com/security/CVE-2026-11605
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-11605.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-11605
- Upstream
- Downstream
- Related
- Published
- 2026-07-22T15:16:00Z
- Modified
- 2026-08-19T18:51:23Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Ubuntu - medium
- Summary
- [none]
- Details
-
The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all RRSIG records in an answer, even if they are not strictly needed. A query to an authoritative server/zone which returns many valid but superfluous RRSIG records causes the validator to waste disproportionate CPU time. This issue affects BIND 9 versions 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, and 9.20.9-S1 through 9.20.24-S1.
- References
Affected packages
Ubuntu:26.04:LTS / bind9
Package
- Name
- bind9
- Purl
- pkg:deb/ubuntu/bind9?arch=source&distro=resolute
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed1:9.20.24-1ubuntu0.2
Affected versions
1:9.*
1:9.20.11-1ubuntu2
1:9.20.11-1ubuntu3
1:9.20.18-1ubuntu1
1:9.20.18-1ubuntu2
1:9.20.18-1ubuntu2.1
1:9.20.24-1ubuntu0.1
Ecosystem specific
{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bind9",
"binary_version": "1:9.20.24-1ubuntu0.2"
},
{
"binary_name": "bind9-dnsutils",
"binary_version": "1:9.20.24-1ubuntu0.2"
},
{
"binary_name": "bind9-host",
"binary_version": "1:9.20.24-1ubuntu0.2"
},
{
"binary_name": "bind9-libs",
"binary_version": "1:9.20.24-1ubuntu0.2"
},
{
"binary_name": "bind9-utils",
"binary_version": "1:9.20.24-1ubuntu0.2"
}
]
}