SUSE-SU-2026:21992-1

This update for libzypp, libsolv fixes the following issues:

libsolv was updated to 0.7.39.

• fix solv_chksum_free segfault when called with a NULL pointer
• made repo_add_solv more robust against corrupt files [bsc#1265935] [CVE-2026-9149]
• fix potential buffer overflow when verifying EdDSA signatures [bsc#1266039] [CVE-2026-48863]
• added limit checks in multiple places to catch overflows
• reduce the size of the language id cache
• fixed Debian canon selection
• fixed dbpath detection in repo_rpmdb_librpm
• reduced stack usage in repo page compression (needed for musl)
• fixed in earlier release: [bsc#1265938] [CVE-2026-9150]
• fix parsing of recommends in the old Mandriva synthesis format

libzypp was updated to 17.38.11:

• Fix potential crash on malformed or malicious repository metadata (fixes #740)
• Repo metadata: discard entries referring to a location outside the repo (bsc#1259802, CVE-2026-25707) Mirroring those data locally would refer to a location outside the repo's local cache directory. Those data entries are reported and discarded.
• zypp.conf: Allow [env] section to add environment variables. This feature is designed to enable environment-specific settings or debugging options over an extended period. See zypp.conf(5).