{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864"
            },
            {
              "fixed": "22987d24a159ed7df3cdc9090ca5d61e58df0cac"
            },
            {
              "fixed": "2f0f1f5a3b89c1ed67e39be49d29ee7f5c96e039"
            },
            {
              "fixed": "dc579e43b13cb65e55eabaae4f1a950e43567fb1"
            },
            {
              "fixed": "a545def625860d4ccedc14fe45e884a62a041cef"
            },
            {
              "fixed": "a6da93c625b3557dd23ff6db45d2d1bafeae1565"
            },
            {
              "fixed": "5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b"
            },
            {
              "fixed": "c997832414f1d846de0a1fa38d7d4f62ba2ea917"
            },
            {
              "fixed": "28b7260548af3d35773477993ad4e4de41578dd7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.11.0"
            },
            {
              "fixed": "5.10.273"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.224"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.191"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.160"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99052.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts\n\nWhen an NFSv4 filesystem exported with security_label is mounted a\nsecond time, sget_fc() returns the existing superblock and\nnfs_get_root() calls security_sb_set_mnt_opts() again on it. Since the\nsuperblock is already SB_INITIALIZED, selinux_set_mnt_opts() takes an\nearly exit without setting SECURITY_LSM_NATIVE_LABELS in\n*set_kern_flags. nfs_get_root() then sees kflags without\nSECURITY_LSM_NATIVE_LABELS set and clears NFS_CAP_SECURITY_LABEL on\nthe shared nfs_server, silently disabling per-file labeling for both\nthe new and the original mount.\n\nCommit 3815a245b501 (\"security/selinux: fix SECURITY_LSM_NATIVE_LABELS\non reused superblock\") fixed the same problem in\nselinux_sb_clone_mnt_opts().  The reused-superblock path for a plain\nsecond mount now goes through sb_set_mnt_opts rather than\nsb_clone_mnt_opts, so it needs the same treatment: on both\nSE_SBINITIALIZED early exits, set SECURITY_LSM_NATIVE_LABELS in\n*set_kern_flags when the superblock was already using\nSECURITY_FS_USE_NATVE.",
  "id": "CVE-2026-99052",
  "modified": "2026-11-01T02:31:00.916261288Z",
  "published": "2026-10-23T12:22:34.168Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22987d24a159ed7df3cdc9090ca5d61e58df0cac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28b7260548af3d35773477993ad4e4de41578dd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f0f1f5a3b89c1ed67e39be49d29ee7f5c96e039"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a545def625860d4ccedc14fe45e884a62a041cef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6da93c625b3557dd23ff6db45d2d1bafeae1565"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c997832414f1d846de0a1fa38d7d4f62ba2ea917"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc579e43b13cb65e55eabaae4f1a950e43567fb1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99052.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99052"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "summary": "selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts"
}