CVE-2026-12505 (GCVE-0-2026-12505)
Vulnerability from cvelistv5
Published
2026-06-18 03:34
Modified
2026-08-25 12:05
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-250 - Execution with Unnecessary Privileges
Summary
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.
References
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:7.6-1.el10_2   < *
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:7.0-5.el8_10   < *
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/o:redhat:enterprise_linux:8::baseos
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:7.6-2.el9_8   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:7.6-2.el9_8   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
   Red Hat Red Hat OpenShift Container Platform 4.22 Unaffected: 4.22.9.8.202607220526-0   < *
    cpe:/a:redhat:openshift:4.22::el9
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
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}


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