CVE-2026-5260

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:13274
https://access.redhat.com/errata/RHSA-2026:20611
https://access.redhat.com/errata/RHSA-2026:20612
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:30004
https://access.redhat.com/errata/RHSA-2026:30849
https://access.redhat.com/errata/RHSA-2026:30850
https://access.redhat.com/errata/RHSA-2026:32962
https://access.redhat.com/errata/RHSA-2026:33125
https://access.redhat.com/errata/RHSA-2026:40762
https://access.redhat.com/errata/RHSA-2026:41921
https://access.redhat.com/errata/RHSA-2026:56853
https://access.redhat.com/errata/RHSA-2026:57483
https://access.redhat.com/errata/RHSA-2026:58981
https://access.redhat.com/errata/RHSA-2026:59831
https://access.redhat.com/errata/RHSA-2026:60019
https://access.redhat.com/security/cve/CVE-2026-5260
https://bugzilla.redhat.com/show_bug.cgi?id=2467450
https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-26 22:16

Updated : 2026-09-03 15:17

NVD link : CVE-2026-5260

Mitre link : CVE-2026-5260

CVE.ORG link : CVE-2026-5260

JSON object : View

Products Affected

No product.

CWE

CWE-126

Buffer Over-read

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"https://access.redhat.com/errata/RHSA-2026:41921", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:56853", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:57483", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:58981", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:59831", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60019", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-5260", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467450", "source": "secalert@redhat.com"}, {"url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-126"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en libgnutls. Un atacante remoto, al enviar un secreto pre-maestro extremadamente corto durante un intercambio de claves RSA a un servidor que utiliza una clave RSA respaldada por un token PKCS#11, podr\u00eda desencadenar una sobrelectura de pila corta. Esta vulnerabilidad de corrupci\u00f3n de memoria podr\u00eda conducir a la revelaci\u00f3n de informaci\u00f3n."}], "lastModified": "2026-09-03T15:17:31.387", "sourceIdentifier": "secalert@redhat.com"}