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CVE-2025-40213 (GCVE-0-2025-40213)

Vulnerability from cvelistv5 – Published: 2025-11-24 15:59 – Updated: 2026-08-05 12:08
VLAI
Title
Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete There is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to memcpy from badly declared on-stack flexible array. Another crash is in set_mesh_complete() due to double list_del via mgmt_pending_valid + mgmt_pending_remove. Use DEFINE_FLEX to declare the flexible array right, and don't memcpy outside bounds. As mgmt_pending_valid removes the cmd from list, use mgmt_pending_free, and also report status on error.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d71b98f253b079cbadc83266383f26fe7e9e103b , < 5c19daa93d9af29f1f46251b47e1ea66bcc8d679 (git)
Affected: 302a1f674c00dd5581ab8e493ef44767c5101aab , < 1c9aca1787e8395a2c59fef20e914467958969c5 (git)
Affected: 302a1f674c00dd5581ab8e493ef44767c5101aab , < e8785404de06a69d89dcdd1e9a0b6ea42dc6d327 (git)
Affected: 0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a (git)
Affected: 87a1f16f07c6c43771754075e08f45b41d237421 (git)
Affected: 6.6.140 , < 6.7 (semver)
Affected: 6.16.10 , < 6.17 (semver)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/bluetooth/mgmt.h",
            "net/bluetooth/mgmt.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "version": "6.6.140",
              "versionType": "semver"
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              "versionType": "semver"
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          "product": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "versionStartIncluding": "6.17",
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete\n\nThere is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to\nmemcpy from badly declared on-stack flexible array.\n\nAnother crash is in set_mesh_complete() due to double list_del via\nmgmt_pending_valid + mgmt_pending_remove.\n\nUse DEFINE_FLEX to declare the flexible array right, and don\u0027t memcpy\noutside bounds.\n\nAs mgmt_pending_valid removes the cmd from list, use mgmt_pending_free,\nand also report status on error."
        }
      ],
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            "baseSeverity": "HIGH",
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            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is triggered entirely through a local AF_BLUETOOTH HCI control (mgmt) socket by sending a MGMT_OP_SET_MESH_RECEIVER command via sendmsg(); no over-the-air interaction is needed to reach or corrupt memory.\nAC:L - Both defects fire deterministically \u2014 any SET_MESH_RECEIVER with param_len \u003e 6 causes the stack out-of-bounds read, and every successful completion hits the double list_del; the optional sock use-after-free variant is a race whose both sides (issuing the command and closing the mgmt fd) are fully attacker-controlled.\nPR:L - Requires a trusted mgmt socket (CAP_NET_ADMIN), the privilege level held by the ordinary non-root Bluetooth daemon on Linux desktops and by Android\u0027s sandboxed bluetooth process, so a compromised Bluetooth stack \u2014 itself remotely attackable \u2014 reaches this with low effective privilege.\nUI:N - The attacker issues the management command directly and no victim action, configuration change, or interaction is required.\nS:U - The out-of-bounds access, list corruption and freed-socket reuse all occur within the kernel\u0027s own security authority with no crossing of a VM, IOMMU or sandbox boundary.\nC:H - Up to 16 bytes of adjacent kernel stack are copied into the persistent hdev-\u003emesh_ad_types filter and can be read back byte-by-byte through the mesh_device_found() advertisement-forwarding oracle, and the use-after-free on the released sock additionally exposes reclaimed slab contents.\nI:H - The second list_del writes through LIST_POISON pointers, and the premature sock_put lets mgmt_cmd_complete() write into a freed, sprayable hci_pinfo/sock object (sk_receive_queue, sk_data_ready), which is a control-flow hijack primitive rather than a bounded modification.\nA:H - The double list_del reliably oopses on poison-pointer dereference (or WARNs under CONFIG_DEBUG_LIST), the stack out-of-bounds read is a hard KASAN BUG, and the error path leaks the cmd, its parameters and a socket reference on every failure."
            }
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:08:38.482Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/5c19daa93d9af29f1f46251b47e1ea66bcc8d679"
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        {
          "url": "https://git.kernel.org/stable/c/e8785404de06a69d89dcdd1e9a0b6ea42dc6d327"
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      "title": "Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete",
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        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40213",
    "datePublished": "2025-11-24T15:59:44.000Z",
    "dateReserved": "2025-04-16T07:20:57.179Z",
    "dateUpdated": "2026-08-05T12:08:38.482Z",
    "state": "PUBLISHED"
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      "initial_release_date": "2025-11-02T00:00:00.000Z",
      "product_status:known_affected": "2",
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      "title": "Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete",
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      "version": "2"
    },
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:34:26+00:00",
      "cve": "CVE-2025-40213",
      "id": "CVE-2025-40213",
      "initial_release_date": "2025-11-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40213.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T00:17:45Z",
      "cve": "CVE-2025-40213",
      "id": "CVE-2025-40213",
      "initial_release_date": "2025-11-25T00:25:24Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "549",
      "product_status:known_not_affected": "321",
      "product_status:recommended": "287",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40213",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40213.json",
      "version": "40"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.