CVE-2026-2903

re2c: re2c: Denial of Service via null pointer dereference

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Severity

Low

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · February 22, 2026

Updated · June 28, 2026

Description

A flaw was found in re2c. A local user can exploit this vulnerability by manipulating the check_and_merge_special_rules function. This manipulation causes a null pointer dereference, which can lead to a denial of service (DoS).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-476 · NULL Pointer Dereference