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[Medium] Patch libxml2 for CVE-2025-6021 #14083

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[Medium] Patch libxml2 for CVE-2025-6021 #14083

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@v-smalavathu v-smalavathu commented Jun 23, 2025 •
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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
Summary

libxml2: Patch for CVE-2025-6021
Patch Modified: Yes

Astrolabe patch reference: https://gitlab.gnome.org/GNOME/libxml2/-/commit/ad346c9a249c4b380bf73c460ad3e81135c5d781
From Upstream patch, Added "include <stdinc.h>" header file in to the patch file, required for definition of SIZE_MAX.

Change Log
  • new file: SPECS/libxml2/CVE-2025-6021.patch
  • modified: SPECS/libxml2/libxml2.spec
  • modified: toolkit/resources/manifests/package/pkggen_core_aarch64.txt
  • modified: toolkit/resources/manifests/package/pkggen_core_x86_64.txt
  • modified: toolkit/resources/manifests/package/toolchain_aarch64.txt
  • modified: toolkit/resources/manifests/package/toolchain_x86_64.txt
Does this affect the toolchain?

YES

Associated issues
  • #xxxx
Links to CVEs
Test Methodology
  • Verified: patch CVE-2025-6021.patch is applied as shown below
    Screenshot 2025-06-23 173205
  • Local build.

@v-smalavathu
Addressing CVE-2025-6021
e4fc622 
Signed-off-by: Sreenivasulu Malavathula <v-smalavathu@microsoft.com>
@v-smalavathu v-smalavathu requested a review from a team as a code owner June 23, 2025 22:44
@v-smalavathu v-smalavathu marked this pull request as draft June 23, 2025 22:44
@microsoft-github-policy-service microsoft-github-policy-service bot added Packaging 3.0-dev PRs Destined for AzureLinux 3.0 labels Jun 23, 2025
@v-smalavathu v-smalavathu marked this pull request as ready for review June 24, 2025 06:01
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@v-smalavathu @Kanishk-Bansal