CVE-2026-99273ksmbd: reserve space for the UTF-16 terminator in stream info
- —Not scoredno CVSS score yet
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 43 days later
· 43 days later
Published
- 3 days later
· 3 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 583ede545a14f275a959772b5e1e50fe3e14b861
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 06a751809ebd33e95b05bf733697318a17a4872b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0e64f89563164719ceb1aa33f2a8bfd6391fa340
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < a025c4991a7d83edc4dd339e3ea86d8ff6226eca
- affected < 6.12.117
- affected < 6.18.61
- affected < 7.3.2
- unaffected 6.12.117 – ≤ 6.12.*
- unaffected 6.18.61 – ≤ 6.18.*
- unaffected 7.3.2 – ≤ 7.3.*
- unaffected 7.4-rc1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/583ede545a14f275a959772b5e1e50fe3e14b861 (opens in a new tab)
- https://git.kernel.org/stable/c/06a751809ebd33e95b05bf733697318a17a4872b (opens in a new tab)
- https://git.kernel.org/stable/c/0e64f89563164719ceb1aa33f2a8bfd6391fa340 (opens in a new tab)
- https://git.kernel.org/stable/c/a025c4991a7d83edc4dd339e3ea86d8ff6226eca (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-119289 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-99273)Record last updated .