OESA-2026-3029 (CVE-2025-2312)

Vulnerability from osv_openeuler – Published: 2026-07-19 11:11 – Updated: 2026-08-06 11:11 – Source website
VLAI
Summary
cifs-utils security update
Details

The in-kernel CIFS filesystem is generally the preferred method for mounting SMB/CIFS shares on Linux.

Security Fix(es):

A flaw was found in cifs-utils. When trying to obtain Kerberos credentials, the cifs.upcall program from the cifs-utils package makes an upcall to the wrong namespace in containerized environments. This issue may lead to disclosing sensitive data from the host's Kerberos credentials cache.(CVE-2025-2312)

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.(CVE-2026-12505)

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "cifs-utils-6.10-9.oe2003sp4.aarch64.rpm",
          "cifs-utils-debuginfo-6.10-9.oe2003sp4.aarch64.rpm",
          "cifs-utils-debugsource-6.10-9.oe2003sp4.aarch64.rpm",
          "cifs-utils-devel-6.10-9.oe2003sp4.aarch64.rpm",
          "cifs-utils-help-6.10-9.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "cifs-utils-6.10-9.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "cifs-utils-6.10-9.oe2003sp4.x86_64.rpm",
          "cifs-utils-debuginfo-6.10-9.oe2003sp4.x86_64.rpm",
          "cifs-utils-debugsource-6.10-9.oe2003sp4.x86_64.rpm",
          "cifs-utils-devel-6.10-9.oe2003sp4.x86_64.rpm",
          "cifs-utils-help-6.10-9.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "cifs-utils",
        "purl": "pkg:rpm/openEuler/cifs-utils\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.10-9.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The in-kernel CIFS filesystem is generally the preferred method for mounting SMB/CIFS shares on Linux.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in cifs-utils. When trying to obtain Kerberos credentials, the cifs.upcall program from the cifs-utils package makes an upcall to the wrong namespace in containerized environments. This issue may lead to disclosing sensitive data from the host\u0026apos;s Kerberos credentials cache.(CVE-2025-2312)\n\nA 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\u0026apos;s controlled NSS Module and configuration, allowing them to execute arbitrary commands as the root user, elevating their privileges and fully compromising the system.(CVE-2026-12505)",
  "id": "OESA-2026-3029",
  "modified": "2026-08-06T11:11:55Z",
  "published": "2026-07-19T11:11:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3029"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-2312"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12505"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cifs-utils security update",
  "upstream": [
    "CVE-2025-2312",
    "CVE-2026-12505"
  ]
}



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