CVE catalog
CVE-2026-2903
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
- Severity
- Medium · CVSS 4.8
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.13% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | re2c | sid | 4.6-1 | fixed |
| Debian | re2c | forky | 4.6-1 | fixed |
| Debian | re2c | trixie | 4.1-1 | vulnerable |
| Debian | re2c | bookworm | 3.0-2 | vulnerable |
| Cpe | re2c | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | re2c | source | sid | 4.5.1-1 | unimportant | Not reported | [1128782] |
| Debian | re2c | source | forky | 4.5.1-1 | unimportant | Not reported | [1128782] |
| Debian | re2c | source | trixie | (unfixed) | unimportant | Not reported | [1128782] |
| Debian | re2c | source | bookworm | (unfixed) | unimportant | Not reported | [1128782] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [re2c]Affected
Details (2)
3.0-2· amd64 · bookwormAffected
nvd · re2c · debian · bookworm; nvd · re2c · debian · 12
3.0-2· arm64 · bookwormAffected
nvd · re2c · debian · bookworm; nvd · re2c · debian · 12
[Debian 13 (Trixie)]
- [re2c]Affected
Details (2)
4.1-1· amd64 · trixieAffected
nvd · re2c · debian · 13
4.1-1· arm64 · trixieAffected
nvd · re2c · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-2903]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-2903]
- [https://security-tracker.debian.org/tracker/CVE-2026-2903]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2903.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]