Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: reserve space for the UTF-16 terminator in stream info smb_strtoUTF16() always writes a terminating zero UTF-16 unit after the converted characters, but get_file_stream_info() budgets only sizeof(struct smb2_file_stream_info) + streamlen * 2 for a stream entry and sizeof(struct smb2_file_stream_info) + 7 * 2 for the trailing "::$DATA" entry. When an entry exactly fills the 448-byte small response buffer, the terminator is written two bytes past the allocation. Reserve one extra UTF-16 unit in both budget checks. The terminator is not part of the wire format, so the reported lengths are unchanged.
References
- https://git.kernel.org/stable/c/06a751809ebd33e95b05bf733697318a17a4872b
- https://git.kernel.org/stable/c/0e64f89563164719ceb1aa33f2a8bfd6391fa340
- https://git.kernel.org/stable/c/a025c4991a7d83edc4dd339e3ea86d8ff6226eca
FAQ
What is CVE-2026-99273?
CVE-2026-99273 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: ksmbd: reserve space for the UTF-16 terminator in stream info smb_strtoUTF16() always writes a terminating zero UTF-16 unit after ...
How severe is CVE-2026-99273?
CVSS scoring is not yet available for CVE-2026-99273. Check NVD for updates.
Is there a patch for CVE-2026-99273?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.