CVE-2026-34183

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-34183
Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames. Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service. A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517 Patch
https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac Patch
https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac Patch
https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb Patch
https://openssl-library.org/news/secadv/20260609.txt Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*
History

23 Jul 2026, 08:10

Type Values Removed Values Added
Summary
  • (es) Resumen del problema: Un par remoto puede agotar la memoria del montón del servidor o cliente QUIC inundándolo con paquetes que contienen tramas PATH_CHALLENGE. Resumen del impacto: Un par remoto malicioso puede causar una asignación de memoria ilimitada que puede llevar a una terminación anormal de la aplicación que actúa como cliente o servidor QUIC y a una denegación de servicio. Un par remoto puede agotar la memoria del montón inundando la pila QUIC local con tramas PATH_CHALLENGE. La pila QUIC local asigna una trama PATH_RESPONSE por cada PATH_CHALLENGE que recibe. La trama PATH_RESPONSE asignada se libera solo cuando el par remoto acusa recibo de la trama PATH_RESPONSE, lo cual no será hecho por un par malicioso. Los módulos FIPS en 4.0, 3.6, 3.5, 3.4 y 3.0 no se ven afectados por este problema. La pila QUIC está fuera del límite del módulo FIPS de OpenSSL.

15 Jun 2026, 18:12

Type Values Removed Values Added
References () https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517 - () https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517 - Patch
References () https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac - () https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac - Patch
References () https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac - () https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac - Patch
References () https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb - () https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb - Patch
References () https://openssl-library.org/news/secadv/20260609.txt - () https://openssl-library.org/news/secadv/20260609.txt - Vendor Advisory
CPE cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
First Time Openssl openssl
Openssl

10 Jun 2026, 16:17

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5

10 Jun 2026, 08:16

Type Values Removed Values Added
References
  • {'url': 'https://github.com/openssl/security/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517', 'source': 'openssl-security@openssl.org'}
  • {'url': 'https://github.com/openssl/security/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac', 'source': 'openssl-security@openssl.org'}
  • {'url': 'https://github.com/openssl/security/commit/d2e9efbe4900a373227deb136e8665401404ffac', 'source': 'openssl-security@openssl.org'}
  • {'url': 'https://github.com/openssl/security/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb', 'source': 'openssl-security@openssl.org'}
  • () https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517 -
  • () https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac -
  • () https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac -
  • () https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb -

09 Jun 2026, 17:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-09 17:17

Updated : 2026-07-23 08:10

NVD link : CVE-2026-34183

Mitre link : CVE-2026-34183

CVE.ORG link : CVE-2026-34183

JSON object : View

Products Affected

openssl

  • openssl
CWE
CWE-1325

Improperly Controlled Sequential Memory Allocation