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      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
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    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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        "category": "details",
        "text": "CVE-2026-12505: perform the user lookup and drop supplementary groups on the host namespace before switching to the caller namespace, fixing a local privilege escalation in cifs.upcall",
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        "date": "2026-07-23T14:56:26Z",
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      },
      "id": "CLSA-2026:1784818499",
      "initial_release_date": "2026-07-23T14:56:26Z",
      "revision_history": [
        {
          "date": "2026-07-23T14:56:26Z",
          "number": "1",
          "summary": "Initial version"
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      "status": "final",
      "version": "1"
    },
    "title": "cifs-utils: Fix of CVE-2026-12505"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-12505",
      "cwe": {
        "id": "CWE-250",
        "name": "Execution with Unnecessary Privileges"
      },
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        }
      ],
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          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-12505"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:32990",
          "url": "https://access.redhat.com/errata/RHSA-2026:32990"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:39575",
          "url": "https://access.redhat.com/errata/RHSA-2026:39575"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:39576",
          "url": "https://access.redhat.com/errata/RHSA-2026:39576"
        },
        {
          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489805"
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        {
          "category": "external",
          "summary": "https://git.samba.org/?p=cifs-utils.git;a=commit;h=972c5b5ff95e3e812bc8daa72d0383654ab0dba7",
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          "summary": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12505.json",
          "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12505.json"
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      "release_date": "2026-06-18T04:16:00Z",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-07-23T14:55:07.179119Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1784818499",
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}