CVE-2026-99273
In the Linux kernel, the following vulnerability has been resolved: ksmbd: reserve space for the UTF-16 terminator in stream info smb_strtoUTF16() always write…
Impact
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.
Affected products · Linux
| Product | Affected versions |
|---|---|
| Linux | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a025c4991a7d83edc4dd339e3ea86d8ff6226eca before 6.18.61 from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0e64f89563164719ceb1aa33f2a8bfd6391fa340 from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 06a751809ebd33e95b05bf733697318a17a4872b before 7.3.2 Version patch: 7.3.2 |
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3jvj-587v-w544
- https://nvd.nist.gov/vuln/detail/CVE-2026-99273
- https://git.kernel.org/stable/c/06a751809ebd33e95b05bf733697318a17a4872b
- https://git.kernel.org/stable/c/0e64f89563164719ceb1aa33f2a8bfd6391fa340
- https://git.kernel.org/stable/c/a025c4991a7d83edc4dd339e3ea86d8ff6226eca