Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M
CVE-2026-45751Suricata detect/transform: use-after-free in dotprefix transform
Medium 5.9
In plain English
A medium-severity use-after-free in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata's inspection-buffer helper could leave an inspection pointer referencing freed memory after a chained transform caused the backing buffer to be reallocated. The issue is reached during a specific network traffic processing, and requires a specific but not malicious rule. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, avoid rules that chain `dotprefix` transform after another one.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-45751 |
| Debian:14 | suricata | 1:8.0.5-1 | DEBIAN-CVE-2026-45751 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45751 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45751 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45751 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-59q6-j4w8-8pjx x_refsource_CONFIRM
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8537 x_refsource_MISC