CVEvulnerability
CVE-2026-39834
9.1 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-22
- Last modified
- 2026-07-23
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weaknesses
- CWE-190
Description
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
Affected configurations
• golang crypto (< 0.52.0)
Related
Weakness · CWE (1)
- CWE-190 Integer Overflow or Wraparound weakness
References
- https://go.dev/cl/781663 Issue Tracking
- https://go.dev/issue/79567 Issue Tracking
- https://groups.google.com/g/golang-announce/c/a082jnz-LvI Mailing List
- https://pkg.go.dev/vuln/GO-2026-5020 Vendor Advisory