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CVE-2026-2903

skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference

CVSS 4.8 MEDIUMEPSS 0.1%CWE-404CWE-476
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.8EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
22 Feb 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
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
Affected products
skvadrik · re2c

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References
https://github.com/oneafter/0202/blob/main/re/reprohttps://github.com/skvadrik/re2c/https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97https://github.com/skvadrik/re2c/issues/571https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101https://vuldb.com/?ctiid.347210https://vuldb.com/?id.347210https://vuldb.com/?submit.755030