PT-2026-50619 · Red Hat · Red Hat Enterprise Linux 10+5

Publicado 2026-06-18 · Atualizado 2026-06-18 · CVE-2026-12505

Mitre

CVSS v3.1

7.8

Alta

Vetor base

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

A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root privileges before looking up user information inside a user-controlled environment. A local, low privileged attacker can exploit this by using a crafted request key payload to trick the root-owned helper into entering a custom environment (namespace) containing a malicious NSS module. This forces the system to load the attacker's controlled NSS Module and configuration, allowing them to execute arbitrary commands as the root user, elevating their privileges and fully compromising the system.

Correção

Enumeração de Fraquezas

CWE-250

Identificadores relacionados

CVE-2026-12505

Produtos afetados

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Openshift Container Platform 4

Referências · 3

• https://bugzilla.redhat.com/show_bug.cgi?id=2489805 · Nota
• https://git.samba.org/?p=cifs-utils.git;a=commit;h=972c5b5ff95e3e812bc8daa72d0383654ab0dba7 · Nota
• https://access.redhat.com/security/cve/CVE-2026-12505 · Nota