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 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 v3 3.3 LOW
CVSS v2.0 1.7 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

1.7^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 3.1 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
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

Configurations

No configuration.

History

15 Apr 2026, 00:35

Type	Values Removed	Values Added
Summary		(es) Se ha encontrado una vulnerabilidad en skvadrik re2c hasta la versión 4.4. La función afectada es check_and_merge_special_rules del archivo src/parse/ast.cc. Esta manipulación provoca una desreferencia de puntero nulo. El ataque solo puede ejecutarse localmente. El exploit ha sido publicado y puede ser utilizado. Nombre del parche: febeb977936f9519a25d9fbd10ff8256358cdb97. Se sugiere instalar un parche para solucionar este problema.

22 Feb 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-22 01:16

Updated : 2026-04-29 01:00

NVD link : CVE-2026-2903

Mitre link : CVE-2026-2903

CVE.ORG link : CVE-2026-2903

JSON object : View

Products Affected

No product.

CWE

CWE-404

Improper Resource Shutdown or Release

CWE-476

NULL Pointer Dereference

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