Patch fluent-bit for CVE-2025-12977 [High] and CVE-2025-12969 [Medium]

[BinduSri-6522866]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• The toolchain has been rebuilt successfully (or no changes were made to it)
• The toolchain/worker package manifests are up-to-date
• Any updated packages successfully build (or no packages were changed)
• Packages depending on static components modified in this PR (Golang, *-static subpackages, etc.) have had their Release tag incremented.
• Package tests (%check section) have been verified with RUN_CHECK=y for existing SPEC files, or added to new SPEC files
• All package sources are available
• cgmanifest files are up-to-date and sorted (./cgmanifest.json, ./toolkit/scripts/toolchain/cgmanifest.json, .github/workflows/cgmanifest.json)
• LICENSE-MAP files are up-to-date (./LICENSES-AND-NOTICES/SPECS/data/licenses.json, ./LICENSES-AND-NOTICES/SPECS/LICENSES-MAP.md, ./LICENSES-AND-NOTICES/SPECS/LICENSE-EXCEPTIONS.PHOTON)
• All source files have up-to-date hashes in the *.signatures.json files
• sudo make go-tidy-all and sudo make go-test-coverage pass
• Documentation has been updated to match any changes to the build system
• Ready to merge

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Summary

Patch fluent-bit for CVE-2025-12977 [High] and CVE-2025-12969 [Medium]

For CVE-2025-12977 [High]:
Astrolabe Patch Reference: fluent/fluent-bit#10967
Patch Modified: No

For CVE-2025-12969 [Medium]:
Astrolabe Patch Reference: fluent/fluent-bit#10973
Patch Modified: Yes

• Declared empty_shared_key in /plugins/in_forward/fw.h file and added cb_count_only function in /tests/runtime/in_forward.c file to align with Upstream patch.

Change Log

• new file: ../SPECS/fluent-bit/CVE-2025-12977.patch
• new file: SPECS/fluent-bit/CVE-2025-12969.patch
• modified: ../SPECS/fluent-bit/fluent-bit.spec

Does this affect the toolchain?

NO

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-2025-12977
• https://nvd.nist.gov/vuln/detail/CVE-2025-12969

Test Methodology

• Local Build
  fluent-bit-3.0.6-6.cm2.src.rpm.log
  fluent-bit-3.0.6-6.cm2.src.rpm.test.log

• Patch applies cleanly

[CBL-Mariner-Bot]

Auto cherry-pick results:

• main ✅ -> [AUTO-CHERRYPICK] Patch fluent-bit for CVE-2025-12977 [High] and CVE-2025-12969 [Medium] - branch main #15207

Auto cherry-pick pipeline run -> https://dev.azure.com/mariner-org/mariner/_build/results?buildId=996133&view=results