CVE catalog
CVE-2021-25737
kubernetes: CVE-2021-25737
- Severity
- Low · CVSS 2.7
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.33% · Oct 25, 2026
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
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 | kubernetes | sid | 1.36.4+ds-1 | fixed |
| Debian | kubernetes | forky | 1.36.4+ds-1 | fixed |
| Debian | kubernetes | trixie | 1.32.3+ds-2 | fixed |
| Debian | kubernetes | bookworm | 1.20.5+really1.20.2-1.1+deb12u1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | kubernetes | source | sid | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | [990793] |
| Debian | kubernetes | source | forky | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | [990793] |
| Debian | kubernetes | source | trixie | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | [990793] |
| Debian | kubernetes | source | bookworm | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | [990793] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [kubernetes-client]Fixed
Source package: [kubernetes]
Details (2)
1.20.5+really1.20.2-1.1+deb12u1· amd64 · bookwormFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · bookworm; dsa · kubernetes · debian · 12
1.20.5+really1.20.2-1.1+deb12u1· arm64 · bookwormFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · bookworm; dsa · kubernetes · debian · 12
[Debian 13 (Trixie)]
- [golang-k8s-kubectl-dev]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· all · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· all · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
- [kubectl]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· amd64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· arm64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
- [kubernetes-client]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· amd64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· arm64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2025_15424-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-25737]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-25737]
- [https://security-tracker.debian.org/tracker/CVE-2021-25737]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-25737.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-0510.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]