afs: Fix potential null pointer dereference in afs_put_server_MS:CVE-2025-40010

{
    "lastseen": "2025-10-22T22:55:07",
    "description": "",
    "published": "2025-10-22T01:01:41",
    "modified": "2025-10-22T01:01:41",
    "type": "mscve",
    "title": "afs: Fix potential null pointer dereference in afs_put_server",
    "source": "",
    "references": "",
    "id": "MS:CVE-2025-40010",
    "bulletinFamily": "microsoft",
    "cwe": null,
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    "href": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-40010",
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