CVE catalog
CVE-2026-41292
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too man
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.75% · Oct 25, 2026
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | unbound | sid | 1.26.2-1 | fixed |
| Debian | unbound | forky | 1.26.2-1 | fixed |
| Debian | unbound | trixie | 1.22.0-2+deb13u3 | fixed |
| Debian | unbound | trixie-security | 1.26.2-0+deb13u1 | fixed |
| Debian | unbound | bookworm | 1.17.1-2+deb12u4 | vulnerable |
| Debian | unbound | bookworm-security | 1.17.1-2+deb12u3 | vulnerable |
| Cpe | unbound | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | libunbound-dev | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | libunbound8 | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | python3-unbound | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | unbound-anchor | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | unbound-host | Not reported | 1.19.2-1ubuntu3.8 | fixed |
| Cpe | unbound | Not reported | Not reported | vulnerable |
| Cpe | unbound | Not reported | 1.25.1 | fixed |
| Cpe | unbound | Not reported | 1.25.1 | fixed |
| Alpine | unbound | 3.22 | 1.25.2-r0 | fixed |
| Alpine | unbound | 3.23 | 1.25.2-r0 | fixed |
| Alpine | unbound | 3.24 | 1.25.1-r0 | fixed |
| Ubuntu | unbound | pro | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.1 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.2 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.3 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.4 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.5 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.6 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.8 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.9 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11 | vulnerable |
| Ubuntu | unbound | pro | 1.9.4-2ubuntu1.11+esm1 | fixed |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.2 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.4 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.7 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.8 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.10 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.11 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.12 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.13 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.14 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.15 | fixed |
| Ubuntu | unbound | 24.04 | 1.17.1-2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.4 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.5 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.6 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.7 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.8 | fixed |
| Ubuntu | unbound | 25.10 | 1.22.0-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 25.10 | 1.22.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 25.10 | 1.22.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 25.10 | 1.22.0-2ubuntu2.1 | vulnerable |
| Ubuntu | unbound | 25.10 | 1.22.0-2ubuntu2.2 | vulnerable |
| Ubuntu | unbound | 25.10 | 1.22.0-2ubuntu2.3 | fixed |
| Ubuntu | unbound | 26.04 | 1.22.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.22.0-2ubuntu4 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2 | vulnerable |
| Ubuntu | unbound | 26.04 | 1.24.2-1ubuntu2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | unbound | source | sid | 1.25.1-1 | not yet assigned | Not reported | [1137187] |
| Debian | unbound | source | forky | 1.25.1-1 | not yet assigned | Not reported | [1137187] |
| Debian | unbound | source | trixie | 1.22.0-2+deb13u3 | not yet assigned | Not reported | [1137187] |
| Debian | unbound | source | bookworm | (unfixed) | not yet assigned | Not reported | [1137187] |
| Cpe | unbound | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | libunbound-dev | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | libunbound8 | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | python3-unbound | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | unbound-anchor | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | unbound-host | cpe | Not reported | 1.19.2-1ubuntu3.8 | Not reported | Not reported | Not reported |
| Cpe | unbound | cpe | Not reported | 1.25.1 | Not reported | Not reported | Not reported |
| Cpe | unbound | cpe | Not reported | 1.25.1 | Not reported | NVD-CVE-2026-41292 | Not reported |
| Alpine | unbound | apk | 3.22 | 1.25.2-r0 | Not reported | ALPINE-CVE-2026-41292 | Not reported |
| Alpine | unbound | apk | 3.23 | 1.25.2-r0 | Not reported | ALPINE-CVE-2026-41292 | Not reported |
| Alpine | unbound | apk | 3.24 | 1.25.1-r0 | Not reported | ALPINE-CVE-2026-41292 | Not reported |
| Ubuntu | unbound | deb | pro | 1.9.4-2ubuntu1.11+esm1 | Not reported | UBUNTU-CVE-2026-41292 | Not reported |
| Ubuntu | unbound | deb | 22.04 | 1.13.1-1ubuntu5.15 | Not reported | UBUNTU-CVE-2026-41292 | Not reported |
| Ubuntu | unbound | deb | 24.04 | 1.19.2-1ubuntu3.8 | Not reported | UBUNTU-CVE-2026-41292 | Not reported |
| Ubuntu | unbound | deb | 25.10 | 1.22.0-2ubuntu2.3 | Not reported | UBUNTU-CVE-2026-41292 | Not reported |
| Ubuntu | unbound | deb | 26.04 | 1.24.2-1ubuntu2.1 | Not reported | UBUNTU-CVE-2026-41292 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libunbound8]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [libunbound-dev]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [python3-unbound]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound]Affected
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound-anchor]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
- [unbound-host]Affected
Source package: [unbound]
Details (4)
1.17.1-2+deb12u4· amd64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u4· arm64 · bookwormAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· amd64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
1.17.1-2+deb12u3· arm64 · bookworm-securityAffected
nvd · unbound · debian · bookworm; nvd · unbound · debian · 12
[Debian 13 (Trixie)]
- [libunbound8]Fixed
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
- [libunbound-dev]Fixed
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
- [python3-unbound]Fixed
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
- [unbound]Fixed
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
- [unbound-anchor]Fixed
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
- [unbound-host]Fixed
Source package: [unbound]
Details (6)
1.22.0-2+deb13u3· amd64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixieFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.22.0-2+deb13u3· arm64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.1-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
1.26.2-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
1.22.0-2+deb13u3nvd · unbound · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_36320.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-41292]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-41292]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-41292]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-41292]
- [https://security-tracker.debian.org/tracker/CVE-2026-41292]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json]
- [https://ubuntu.com/security/notices/USN-8282-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2455.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]