{"id":"DEBIAN-CVE-2026-2903","details":"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.","modified":"2026-09-14T17:03:25.495051181Z","published":"2026-02-22T01:16:00.563Z","upstream":["CVE-2026-2903"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-2903"}],"affected":[{"package":{"name":"re2c","ecosystem":"Debian:12","purl":"pkg:deb/debian/re2c?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0-2","3.1-1","4.0.1-1","4.0.2-1","4.1-1","4.2-1","4.3-1","4.3-2","4.3.1-1","4.4-1","4.5.1-1","4.6-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2903.json"}},{"package":{"name":"re2c","ecosystem":"Debian:13","purl":"pkg:deb/debian/re2c?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1-1","4.2-1","4.3-1","4.3-2","4.3.1-1","4.4-1","4.5.1-1","4.6-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2903.json"}},{"package":{"name":"re2c","ecosystem":"Debian:14","purl":"pkg:deb/debian/re2c?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1-1"}]}],"versions":["4.1-1","4.2-1","4.3-1","4.3-2","4.3.1-1","4.4-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2903.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}