4.3Media

CVE-2026-59850Libssh: libssh: use-after-free via data callbacks on closed channels

Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 8; Red Hat Red Hat Enterprise Linux 9; Red Hat Red Hat Hardened Images Publicada: 2026-07-21 17:15 (hace 3 meses)

Descripción

A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions.

Debilidad (CWE): CWE-416

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Fabricante	Producto	Versiones
enterprise linux	8	—
enterprise linux	9	—
libssh	libssh	—
redhat	enterprise linux	8.0
redhat	hardened images	—
Red Hat	Red Hat Enterprise Linux 10	all versions
Red Hat	Red Hat Enterprise Linux 8	all versions
Red Hat	Red Hat Enterprise Linux 9	all versions
Red Hat	Red Hat Hardened Images	all versions

Referencias y parches

RHSA-2026:42922 vendor-advisoryIssue Tracking
RHSA-2026:55855 vendor-advisory
RHSA-2026:62217 vendor-advisory
RHSA-2026:62218 vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-59850 vdb-entryVendor Advisory
RHBZ#2498183 issue-trackingIssue TrackingVendor Advisory

Coincidencias CPE (NVD) (5)

cpe:2.3:a:libssh:libssh:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Puntuación CVSS

4.3Media

Fuente: redhat · CVSS 3.1

Vector de ataque: Red
Complejidad: Baja
Privilegios: Bajos
Interacción del usuario: Ninguna
Alcance: Sin cambio
Confidencialidad: Ninguno
Integridad: Ninguno
Disponibilidad: Bajo

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Todas las puntuaciones (3)

cna	CVSS 3.1	4.3Media
secalert@redhat.com	CVSS 3.1	4.3Media
nvd	CVSS 3.1	7.5Alta

EPSS (probabilidad de explotación en 30 días)

0.35%

superior al 29 % de todas las CVE

Evaluación de CISA (SSVC)

Explotación: none
Automatizable: no
Impacto técnico: partial

Cronología

ID reservado2026-07-07
Publicada2026-07-21 17:15
Llegó a IP-DB2026-10-24 23:45
Última actualización2026-09-02 00:18

Asignada por (CNA): redhat
Estado en NVD: Modified

Ver en la fuente: CVE.org · NVD

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