CVE-2026-2903
4.8
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| skvadrik | re2c | 4.0 | affected |
| skvadrik | re2c | 4.1 | affected |
| skvadrik | re2c | 4.2 | affected |
| skvadrik | re2c | 4.3 | affected |
| skvadrik | re2c | 4.4 | affected |
Weaknesses
- CWE-476: NULL Pointer Dereference
- CWE-404: Denial of Service
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
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/
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