Is CVE-2023-27595 actively exploited?

No active exploitation of CVE-2023-27595 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-27595 be exploited remotely?

Yes. CVE-2023-27595 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-27595?

CVE-2023-27595 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-27595

CRITICAL

CVE-2023-27595

CWE-755Published: March 17, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In version 1.13.0, when Cilium is started, there is a short period when Cilium eBPF programs are not attached to the host. During this period, the host does not implement any of Cilium's featureset. This can cause disruption to newly established connections during this period due to the lack of Load Balancing, or can cause Network Policy bypass due to the lack of Network Policy enforcement during the window. This vulnerability impacts any Cilium-managed endpoints on the node (such as Kubernetes Pods), as well as the host network namespace (including Host Firewall). This vulnerability is fixed in Cilium 1.13.1 or later. Cilium releases 1.12.x, 1.11.x, and earlier are not affected. There are no known workarounds.

NVD Source

Technical Analysis

CVE-2023-27595 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.