Out-of-bounds read in Suricata - #VU162651
Published: November 9, 2026
Vulnerability identifier: #VU162651
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to trigger a heap out-of-bounds read of up to seven bytes in Suricata.
The vulnerability exists due to unsafe handling of the runtime byte count when an operator-authored rule supplies a byte_extract or byte_math variable as the first argument to byte_test. An unauthenticated remote attacker can send crafted traffic that triggers the read, whose value is discarded.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7