fix: upgrade Go to 1.25.7 to resolve CVE-2025-68121

[WSandboxedOCCodeBot]

Summary

Upgrades Go version to 1.25.7 to fix a CRITICAL vulnerability in the Go standard library.

CVE Fixed

CVE-2025-68121 (CRITICAL): crypto/tls session resumption vulnerability

Vulnerability Findings

Trivy Scan Command

trivy image --severity HIGH,CRITICAL registry.k8s.io/coredns/coredns:v1.12.0

Before Fix (registry.k8s.io/coredns/coredns:v1.12.0)

coredns (gobinary)
==================
Total: 3 (HIGH: 2, CRITICAL: 1)

| Library | Vulnerability  | Severity | Title |
|---------|----------------|----------|-------|
| stdlib  | CVE-2025-68121 | CRITICAL | crypto/tls: Unexpected session resumption |
| stdlib  | CVE-2025-47907 | HIGH     | database/sql: Postgres Scan Race Condition |
| stdlib  | CVE-2025-58183 | HIGH     | archive/tar: Unbounded allocation |

After Fix

Go 1.25.7 contains patches for these stdlib vulnerabilities.

This is a minimal patch-level version bump fix.

[linux-foundation-easycla]

• ❌ The email address for the commit (ad6a395) is not linked to the GitHub account, preventing the EasyCLA check. Consult this Help Article and GitHub Help to resolve. (To view the commit's email address, add .patch at the end of this PR page's URL.) For further assistance with EasyCLA, please submit a support request ticket.

[k8s-ci-robot]

Hi @WSandboxedOCCodeBot. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: WSandboxedOCCodeBot
Once this PR has been reviewed and has the lgtm label, please assign damiansawicki for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment