Out-of-bounds write in hyperscan - CVE-2026-40694
Published: November 13, 2026
Vulnerability identifier: #VU166185
CSH Severity: Low
CVSS v4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40694
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input. A local user can trigger an out-of-bounds write and perform a denial of service (DoS) attack.
Affected software
hyperscan
How to mitigate CVE-2026-40694
Install updates from vendor's website.
hyperscan - update to 5.4.2.1