> CVE-2026-5265 [MEDIUM]

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PUBLISHED
2026-04-24 13:16
MODIFIED
2026-04-24 13:16
CVSS_SCORE V3
6.5
EPSS (Prob. Exploit)
0.66%
Top 49.0%
DATA SOURCES:
NVD 🔗 2026-04-24 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25

> DESCRIPTION

When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.

> 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:L/I:N/A:H
EXPLOITABILITY
2.2
IMPACT
4.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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
Low (L)
Divulgation limitée 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
Low
Divulgation limitée d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-130

> CWE DETAILED DESCRIPTIONS

CWE-130: Improper Handling of Length Parameter Inconsistency - The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: ovn25.09 security update
An update for ovn25.09 is now available for Fast Datapath for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn23.06 security update
An update for ovn23.06 is now available for Fast Datapath for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn-2021 security update
An update for ovn-2021 is now available for Fast Datapath for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn24.03 security update
An update for ovn24.03 is now available for Fast Datapath for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn25.03 security update
An update for ovn25.03 is now available for Fast Datapath for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn23.09 security update
An update for ovn23.09 is now available for Fast Datapath for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn23.06 security update
An update for ovn23.06 is now available for Fast Datapath for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: ovn25.03 security update
An update for ovn25.03 is now available for Fast Datapath for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabil...
Red Hat Security Advisory: ovn25.09 security update
An update for ovn25.09 is now available for Fast Datapath for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabil...

> HISTORIQUE DES MODIFICATIONS

Première apparition
24/04/2026 13:16
Source: NVD
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-130: Improper Handling of Length Parameter Inconsistency - The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent wi...
Total des modifications: 1 Dernière mise à jour: 6 months ago

> REFERENCES

https://access.redhat.com/security/cve/CVE-2026-5265
https://bugzilla.redhat.com/show_bug.cgi?id=2453458
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