rxrpc: Fix missing validation of ticket length in non-XDR key preparsing_MS:CVE-2026-31696

{
    "lastseen": "2026-05-03T07:15:12",
    "description": "",
    "published": "2026-05-02T08:04:32",
    "modified": "2026-05-02T21:40:57",
    "type": "mscve",
    "title": "rxrpc: Fix missing validation of ticket length in non-XDR key preparsing",
    "source": "",
    "references": "",
    "id": "MS:CVE-2026-31696",
    "bulletinFamily": "microsoft",
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    "href": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-31696",
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