[Medium] Patch libxml2 for CVE-2025-6021

[v-smalavathu]

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

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

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-2025-6021

Test Methodology

• Verified: patch CVE-2025-6021.patch is applied as shown below
  

• Local build.

[Sumynwa]

In upstream master, this macro is defined in 2 headers:
#include "private/memory.h": Refer commit
#include "private/io.h"

tree.c includes these headers. But the commits are not present in our sources and hence we see the error.
I would suggest we add similar definition in tree.c rather than importing a complete header file.

[v-smalavathu]

The upstream master libxml2 version is 2,15.0 but our 2,0 branch libxml2 version is 2.10.4. The files mentioned above is not available like private/memory.h or private/io.h in our version. In our version tree,c file, is does not include 'private/*.h' header files, also does not exist.
-Thanks

[Sumynwa]

Except for the header changes, the patches are in line with upstream changes