CVE-2026-2903

LOW

skvadrik re2c <=4.4 - Memory Corruption

Title source: llm

Description

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.

References (8)

[Various Sources] https://github.com/oneafter/0202/blob/main/re/repro

View Writeup ZIP pw:eip

[Various Sources] https://github.com/skvadrik/re2c/

[Permissions Required, VDB Entry] https://vuldb.com/?ctiid.347210

[Permissions Required, VDB Entry] https://vuldb.com/?id.347210

[Permissions Required, VDB Entry] https://vuldb.com/?submit.755030

[Patch] https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97

[Issue Tracking] https://github.com/skvadrik/re2c/issues/571

[Issue Tracking] https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101

Scores

CVSS v3 3.3

EPSS 0.0001

EPSS Percentile 2.6%

Attack Vector LOCAL

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

Classification

CWE

CWE-476 CWE-404

Status draft

Timeline

Published Feb 22, 2026

Tracked Since Feb 22, 2026