> CVE-2025-66627 [HIGH]

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PUBLISHED
2025-12-09 16:18
MODIFIED
2025-12-09 16:18
CVSS_SCORE V3
8.4
EPSS (Prob. Exploit)
0.15%
Top 96.1%
DATA SOURCES:
NVD đź”— 2025-12-09 CVE PROJECT đź”— 2026-01-19 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 GITHUB đź”— 2026-11-04 OSV đź”— 2026-11-08

> DESCRIPTION

Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory growth conditions. This issue potentially leads to memory corruption, information disclosure, or code execution. This issue is fixed in versions 0.41.2, 0.47.1, 0.51.3 and 1.0.1. To workaround this issue, consider limiting the maximum linear memory sizes where feasible.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
2.5
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-416

> CWE DETAILED DESCRIPTIONS

CWE-416: Use After Free - The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

> GITHUB SECURITY ADVISORY

GHSA-g4v2-cjqp-rfmq HIGH

Critical Use-After-Free in Wasmi's Linear Memory

AFFECTED PACKAGES:
RUST / wasmi
>= 1.0.0, < 1.0.1
Fixed in: 1.0.1
RUST / wasmi
>= 0.50.0, < 0.51.3
Fixed in: 0.51.3
RUST / wasmi
>= 0.42.0, < 0.47.1
Fixed in: 0.47.1
RUST / wasmi
>= 0.41.0, < 0.41.2
Fixed in: 0.41.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Wasmi's Linear Memory has a Critical Use After Free Vulnerability

AFFECTED PACKAGES:
Unknown / Unknown
8 versions affected
ALIASES:
GHSA-g4v2-cjqp-rfmq

> HISTORIQUE DES MODIFICATIONS

Première apparition
09/12/2025 16:18
Source: NVD
đź“Š ENRICHISSEMENT 19/01/2026 17:38
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
đź“Š ENRICHISSEMENT 01/01/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-416: Use After Free - The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original p...
Total des modifications: 2 Dernière mise à jour: 9 months ago

> REFERENCES

https://github.com/wasmi-labs/wasmi/security/advisories/GHSA-g4v2-cjqp-rfmq
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