{"id":"CVE-2026-2903","state":"PUBLISHED","title":"skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference","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.","publishedAt":"2026-02-22T00:32:09.412Z","updatedAt":"2026-06-23T15:50:16.004Z","severity":{"score":4.8,"label":"Medium","version":"4.0","vector":"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","source":"VulDB"},"assigner":"VulDB","products":["skvadrik re2c"],"affected":[{"vendor":"skvadrik","product":"re2c","versions":[{"version":"4.0","status":"affected"},{"version":"4.1","status":"affected"},{"version":"4.2","status":"affected"},{"version":"4.3","status":"affected"},{"version":"4.4","status":"affected"}],"cpes":["cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*"]}],"references":["https://vuldb.com/?id.347210","https://vuldb.com/?ctiid.347210","https://vuldb.com/?submit.755030","https://github.com/skvadrik/re2c/issues/571","https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101","https://github.com/oneafter/0202/blob/main/re/repro","https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97","https://github.com/skvadrik/re2c/"],"weaknesses":["CWE-476","CWE-404"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/2xxx/CVE-2026-2903.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-2903","state":"PUBLISHED","datePublished":"2026-02-22T00:32:09.412Z","dateUpdated":"2026-06-23T15:50:16.004Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-02-20T20:02:38.891Z"},"containers":{"cna":{"title":"skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference","descriptions":[{"lang":"en","value":"A flaw has been found in skvadrik re2c up to 4.4. 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