> CVE-2026-63448 [MEDIUM]

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PUBLISHED
2026-09-18 21:17
MODIFIED
2026-09-18 21:17
CVSS_SCORE V3
5.9
EPSS (Prob. Exploit)
0.45%
Top 62.6%
DATA SOURCES:
NVD 🔗 2026-09-18 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-18 OSV 🔗 2026-09-25

> DESCRIPTION

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, the SMB parser can retain force-completed transactions on flows where Suricata sees payload in only one direction, including async-oneside flows, because cleanup waits for inspection in the unseen direction. The transaction creation paths in rust/src/smb can exceed the intended SMB_MAX_TX bound, and cleanup repeatedly scans the growing list. Sustained one-directional SMB traffic can therefore cause unbounded per-flow state and CPU and memory exhaustion. This issue is fixed in versions 8.0.6 and 7.0.17.

> 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:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
2.2
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies 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
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-400 CWE-401 CWE-407

> CWE DETAILED DESCRIPTIONS

CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource. | CWE-401: Missing Release of Memory after Effective Lifetime - The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. | CWE-407: Inefficient Algorithmic Complexity - An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Suricata smb: some SMB flows can cause resource exhaustion

AFFECTED PACKAGES:
Unknown / Unknown
95 versions affected
ALIASES:
GHSA-hvvj-c8xx-9g35

> HISTORIQUE DES MODIFICATIONS

Première apparition
18/09/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-400: Uncontrolled Resource Consumption - The product does not properly control the allocation and maintenance of a limited resource. | CWE-401: Missing Release of Memory after Effective Lifetime -...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476
https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4
https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a
https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281
https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce
https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
https://github.com/OISF/suricata/security/advisories/GHSA-hvvj-c8xx-9g35
https://redmine.openinfosecfoundation.org/issues/8629
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