CVE-2026-2903: Skvadrik RE2C

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.

Affected products

• Skvadrik RE2C: version 4.0 only; version 4.1 only; version 4.2 only; version 4.3 only; version 4.4 only

Published 2026-02-22. Last modified 2026-06-17.