CVE-2026-2903skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-476, CWE-404
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Jun 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
skvadrik re2c re2c:re2c | 4.0; 4.1; 4.2; 4.3; 4.4 | CNA record |
References
- https://vuldb.com/?id.347210vdb-entry, technical-description
- https://vuldb.com/?ctiid.347210signature, permissions-required
- https://vuldb.com/?submit.755030third-party-advisory
- https://github.com/skvadrik/re2c/issues/571issue-tracking
- https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101issue-tracking
- https://github.com/oneafter/0202/blob/main/re/reproexploit
- https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97patch
- https://github.com/skvadrik/re2c/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.