Integer overflow in Golang.org/x/sys Golang.org/x/sys/windows
CVE-2026-39824
NewNTUnicodeString does not check for string length overflow. When provided with a string that overflows the maximum size of a NTUnicodeString (a 16-bit number of bytes), it returns a truncated string rather than an error.
Vulnerability class: Integer Overflow
EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Golang.org/x/sys Golang.org/x/sys/windows — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-39824?
- CVE-2026-39824 is a low-severity vulnerability in Golang.org/x/sys Golang.org/x/sys/windows, classified under Integer Overflow or Wraparound. CVSS score: 3.3/10. Published 2026-05-22.
- How severe is CVE-2026-39824?
- Low severity. CVSS v3 base score is 3.3 out of 10.