Out-of-bounds read in hyperscan - CVE-2026-40424
Published: November 13, 2026
Vulnerability identifier: #VU166188
CSH Severity: Low
CVSS v4: 5.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40424
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to compromise the target system.
The vulnerability exists due to a boundary condition. A local attacker can trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.
Affected software
hyperscan
How to mitigate CVE-2026-40424
Install updates from vendor's website.
hyperscan - update to 5.4.2.1