CVE-2026-52945 remediation guide

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: Revert "wireguard: device: enable threaded NAPI" This reverts commit 933466fc50a8e4eb167acbd0d8ec96a078462e9c which is commit db9ae3b6b43c79b1ba87eea849fd65efa05b4b2e upstream. We have had three independent production user reports in combination with Cilium utilizing WireGuard as encryption underneath that k8s Pod E/W traffic to certain peer nodes fully stalled. The situation appears as follows: - Occurs very rarely but at random times under heavy networking load. - Once the issue triggers the decryption side stops working...

Open CVE record

ProductLinux Linux, linux kernel

Affected versions>= 18e65229a328304a7ef59899a30fd34ad73ed56b < cfdb22762f903d95c36ab91e9fe6167f22fa9f6d, >= fb978675ccfd4a93549e49624127d8332cc61cbf < 42bc3f45425b607a5ca7b7aaaab661b54407c8f8, >= 8c9e9cd398777fd60ba202211da1110614cb5bc5 < 168ee1549fa24fff2ab924a2ca7b1d85f30e062d, >= 933466fc50a8e4eb167acbd0d8ec96a078462e9c < e94b369ff82f9bc84f090f271bd78f41c9f6ab2f, >= aba544ff9ec522e120b1b3d8b32efa4e6d16d4d7, >= 6.15.3 < 6.16, >= 5.15.186 < 5.15.201, >= 6.1.142 < 6.1.164, >= 6.6.94 < 6.6.127, >= 6.12.34 < 6.12.74

Fixed versions5.15.201, 6.1.164, 6.6.127, 6.12.74, 6.16

Priority basisReview · CVSS 7.5 · EPSS 0.31%

Identify the affected asset

Confirm whether Linux Linux, linux kernel is installed, record the deployed version and installation path, and identify exposed interfaces.

Record the product name, package or appliance identifier, and installed version.
Identify internet-facing, administrative, API, and internal access paths.
Preserve the pre-change configuration and relevant service logs.

Validate the affected-version match

Compare the deployed version with the affected range: >= 18e65229a328304a7ef59899a30fd34ad73ed56b < cfdb22762f903d95c36ab91e9fe6167f22fa9f6d, >= fb978675ccfd4a93549e49624127d8332cc61cbf < 42bc3f45425b607a5ca7b7aaaab661b54407c8f8, >= 8c9e9cd398777fd60ba202211da1110614cb5bc5 < 168ee1549fa24fff2ab924a2ca7b1d85f30e062d, >= 933466fc50a8e4eb167acbd0d8ec96a078462e9c < e94b369ff82f9bc84f090f271bd78f41c9f6ab2f, >= aba544ff9ec522e120b1b3d8b32efa4e6d16d4d7, >= 6.15.3 < 6.16, >= 5.15.186 < 5.15.201, >= 6.1.142 < 6.1.164, >= 6.6.94 < 6.6.127, >= 6.12.34 < 6.12.74. Treat incomplete inventory results as unresolved.

Prioritize with independent signals

The CVSS severity warrants an early asset and exposure review. Combine this signal with asset criticality, exposure, compensating controls, and business impact.

Apply supported remediation

Follow the vendor advisory or supported update path. Current fixed-version status: 5.15.201, 6.1.164, 6.6.127, 6.12.74, 6.16. Preserve configuration and rollback material before change.

Verify the result

Confirm the resulting version, service health, authentication and access paths, monitoring coverage, and relevant security logs.

Confirm the expected version and package state.
Run a functional health check for critical service paths.
Review authentication, error, application, and security monitoring logs.
Reassess exposure if the supported fix cannot be applied.

Operational boundary

This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.