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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-12505

Cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall

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Status
Published
Published
Updated
Assigning organization
redhat

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:7.6-1.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:7.0-5.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:7.6-2.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:7.6-2.el9_8 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.22

Default version status: affected

  • 4.22.9.8.202607220526-0 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unknown

Red Hat Red Hat Enterprise Linux 7

Default version status: unaffected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

References