Answer in brief
CVE-2026-99273 records a Unknown severity vulnerability in ksmbd: reserve space for the UTF-16 terminator in stream info. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <06a751809ebd33e95b05bf733697318a17a4872b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e64f89563164719ceb1aa33f2a8bfd6391fa340 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a025c4991a7d83edc4dd339e3ea86d8ff6226eca || >=0 <6.18.61 || >=0 <7.3.2 | 06a751809ebd33e95b05bf733697318a17a4872b, 0e64f89563164719ceb1aa33f2a8bfd6391fa340, a025c4991a7d83edc4dd339e3ea86d8ff6226eca, 6.18.61, 7.3.2 |
Published upstream
Nov 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.