What is CVE-2026-2903?

CVE-2026-2903 is a low-severity vulnerability in Skvadrik Re2c, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-02-22.

How severe is CVE-2026-2903?

Low severity. CVSS v3 base score is 3.3 out of 10.

NULL pointer dereference in Skvadrik Re2c

CVE-2026-2903

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.

EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Skvadrik Re2c — versions 4.0, 4.1, 4.2

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking)
cna@vuldb.com (issue-tracking)
cna@vuldb.com (exploit)
cna@vuldb.com (patch)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-2903?: CVE-2026-2903 is a low-severity vulnerability in Skvadrik Re2c, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-02-22.
How severe is CVE-2026-2903?: Low severity. CVSS v3 base score is 3.3 out of 10.