{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7ec535ed8724d18ae4e714d2277a5b89450659d2"
            },
            {
              "fixed": "ae9cd0b46b1890040006a2fc5e905c5d6053fd02"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "340f0c7067a95281ad13734f8225f49c6cf52067"
            },
            {
              "fixed": "44e64d8a432837308f4dda3ffe819f1ec092a0ba"
            },
            {
              "fixed": "52b109f1b875b912d4ab2c5fdd8c322d47119d9b"
            },
            {
              "fixed": "ed2ad73bcb0a7a6cc934097d4853b6d5124c317e"
            },
            {
              "fixed": "07004a8c4b572171934390148ee48c4175c77eed"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "99b86d85f7c73d676c50e8c35748f94dd41389da"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.35"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.9.6"
            },
            {
              "fixed": "6.10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.10.0"
            },
            {
              "fixed": "6.18.30"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46106.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\neventfs: Hold eventfs_mutex and SRCU when remount walks events\n\nCommit 340f0c7067a9 (\"eventfs: Update all the eventfs_inodes from the\nevents descriptor\") had eventfs_set_attrs() recurse through ei-\u003echildren\non remount.  The walk only holds the rcu_read_lock() taken by\ntracefs_apply_options() over tracefs_inodes, which is wrong:\n\n  - list_for_each_entry over ei-\u003echildren races with the list_del_rcu()\n    in eventfs_remove_rec() -- LIST_POISON1 deref, same shape as\n    d2603279c7d6.\n  - eventfs_inodes are freed via call_srcu(\u0026eventfs_srcu, ...).\n    rcu_read_lock() does not extend an SRCU grace period, so ti-\u003eprivate\n    can be reclaimed under the walk.\n  - The writes to ei-\u003eattr race with eventfs_set_attr(), which holds\n    eventfs_mutex.\n\nReproducer:\n\n  while :; do mount -o remount,uid=$((RANDOM%1000)) /sys/kernel/tracing; done \u0026\n  while :; do\n      echo \"p:kp submit_bio\" \u003e /sys/kernel/tracing/kprobe_events\n      echo \u003e /sys/kernel/tracing/kprobe_events\n  done\n\nWrap the events portion of tracefs_apply_options() in\neventfs_remount_lock()/_unlock() that take eventfs_mutex and\nsrcu_read_lock(\u0026eventfs_srcu).  eventfs_set_attrs() doesn't sleep so the\nnested rcu_read_lock() is fine; lockdep_assert_held() pins the contract.\n\nComment in tracefs_drop_inode() said \"RCU cycle\" -- it is SRCU.",
  "id": "CVE-2026-46106",
  "modified": "2026-08-12T03:51:25.421258252Z",
  "published": "2026-05-28T09:35:11.034Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07004a8c4b572171934390148ee48c4175c77eed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44e64d8a432837308f4dda3ffe819f1ec092a0ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52b109f1b875b912d4ab2c5fdd8c322d47119d9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae9cd0b46b1890040006a2fc5e905c5d6053fd02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed2ad73bcb0a7a6cc934097d4853b6d5124c317e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46106.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46106"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "eventfs: Hold eventfs_mutex and SRCU when remount walks events"
}