[High] Patch cloud-hypervisor-cvm for CVE-2026-27211

[akhila-guruju]

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

Patch cloud-hypervisor-cvm for CVE-2026-27211
Upstream Patch link: https://github.com/microsoft/cloud-hypervisor/commit/69e16ca82cdcd7ad3c4361223a4754cc8ce7f672.patch

Patch Backported: Yes

• Upstream codebase has already defined from_with_nesting_depth() and used in the file block/src/qcow_sync.rs. But in v38.0.72.2, the func is not defined. So, backported this func and related variables in file block/src/qcow/mod.rs

Change Log

• new file: SPECS/cloud-hypervisor-cvm/CVE-2026-27211.patch
• modified: SPECS/cloud-hypervisor-cvm/cloud-hypervisor-cvm.spec

Does this affect the toolchain?

NO

Associated issues

• #xxxx

Links to CVEs

• https://nvd.nist.gov/vuln/detail/CVE-2026-27211

Test Methodology

• Local Build
• Patch applies cleanly