ci: use Ubuntu 26.04 for lint container
What the developer wrote
Authored by fanquake
ci: use Ubuntu 26.04 for lint container
What changed, and why it matters
This commit simply updates the version of Ubuntu used by Bitcoin Core's automated linting (code style checking) container from 24.04 to 26.04. It is a routine CI/infrastructure maintenance change with no security relevance visible in the commit.
No security action needed. Treat as normal CI maintenance.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The diff changes one line in ci/lint_imagefile, updating the base Docker image from mirror.gcr.io/ubuntu:24.04 to mirror.gcr.io/ubuntu:26.04. This file is used only for running lint checks in continuous integration. No code, dependencies, cryptographic logic, or runtime behavior of Bitcoin Core is modified.
Changed components
ci/lint_imagefileInspect captured patch +1 / −1
diff --git a/ci/lint_imagefile b/ci/lint_imagefile
index 00f7f03c..cc4986a7 100644
--- a/ci/lint_imagefile
+++ b/ci/lint_imagefile
@@ -4,7 +4,7 @@
# See test/lint/README.md for usage.
-FROM mirror.gcr.io/ubuntu:24.04
+FROM mirror.gcr.io/ubuntu:26.04
# Pin uv and ruff to minor version to avoid breaking changes
# https://docs.astral.sh/uv/reference/policies/versioning/
Why this scored 15/100
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