Bug 2441707 (CVE-2026-2903)

Summary: CVE-2026-2903 re2c: re2c: Denial of Service via null pointer dereference
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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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).
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Description OSIDB Bzimport 2026-02-22 01:01:31 UTC 
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.