CVE-2026-2903
low
CVSS v3
3.3
CVSS v2
1.7
VIR risk
3.3
Description
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.
Predictions
Exploit likelihood
34%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-2903
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-2903.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 4.5.1-1 |
| debian | sid | fixed | 4.5.1-1 |
| debian | trixie | affected | |
References
- https://github.com/oneafter/0202/blob/main/re/repro
- https://github.com/skvadrik/re2c/
- https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97
- https://github.com/skvadrik/re2c/issues/571
- https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101
- https://vuldb.com/?ctiid.347210
- https://vuldb.com/?id.347210
- https://vuldb.com/?submit.755030
- https://www.suse.com/security/cve/CVE-2026-2903.html
- https://security-tracker.debian.org/tracker/CVE-2026-2903
CWEs
CWE-404 CWE-476
Verify integrity in audit chain (admin only). AS-IS.