CVE-2026-43059 (GCVE-0-2026-43059)
Vulnerability from cvelistv5
Published
2026-05-05 15:17
Modified
2026-05-23 16:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers Commit 302a1f674c00 ("Bluetooth: MGMT: Fix possible UAFs") introduced mgmt_pending_valid(), which not only validates the pending command but also unlinks it from the pending list if it is valid. This change in semantics requires updates to several completion handlers to avoid list corruption and memory safety issues. This patch addresses two left-over issues from the aforementioned rework: 1. In mgmt_add_adv_patterns_monitor_complete(), mgmt_pending_remove() is replaced with mgmt_pending_free() in the success path. Since mgmt_pending_valid() already unlinks the command at the beginning of the function, calling mgmt_pending_remove() leads to a double list_del() and subsequent list corruption/kernel panic. 2. In set_mesh_complete(), the use of mgmt_pending_foreach() in the error path is removed. Since the current command is already unlinked by mgmt_pending_valid(), this foreach loop would incorrectly target other pending mesh commands, potentially freeing them while they are still being processed concurrently (leading to UAFs). The redundant mgmt_cmd_status() is also simplified to use cmd->opcode directly.
References
Impacted products
Vendor Product Version
Linux Linux Version: d71b98f253b079cbadc83266383f26fe7e9e103b
Version: 302a1f674c00dd5581ab8e493ef44767c5101aab
Version: 302a1f674c00dd5581ab8e493ef44767c5101aab
Version: 302a1f674c00dd5581ab8e493ef44767c5101aab
Version: 0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a
Version: 87a1f16f07c6c43771754075e08f45b41d237421
Version: 6.12.59   ≤
Version: 6.6.140   ≤
Version: 6.16.10   ≤
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix list corruption and UAF in command complete handlers\n\nCommit 302a1f674c00 (\"Bluetooth: MGMT: Fix possible UAFs\") introduced\nmgmt_pending_valid(), which not only validates the pending command but\nalso unlinks it from the pending list if it is valid. This change in\nsemantics requires updates to several completion handlers to avoid list\ncorruption and memory safety issues.\n\nThis patch addresses two left-over issues from the aforementioned rework:\n\n1. In mgmt_add_adv_patterns_monitor_complete(), mgmt_pending_remove()\nis replaced with mgmt_pending_free() in the success path. Since\nmgmt_pending_valid() already unlinks the command at the beginning of\nthe function, calling mgmt_pending_remove() leads to a double list_del()\nand subsequent list corruption/kernel panic.\n\n2. In set_mesh_complete(), the use of mgmt_pending_foreach() in the error\npath is removed. Since the current command is already unlinked by\nmgmt_pending_valid(), this foreach loop would incorrectly target other\npending mesh commands, potentially freeing them while they are still being\nprocessed concurrently (leading to UAFs). The redundant mgmt_cmd_status()\nis also simplified to use cmd-\u003eopcode directly."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:06:09.898Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/695b45b2262fcb5e71bed1175aad59c72f92aa78"
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        {
          "url": "https://git.kernel.org/stable/c/b5c5e96f3b0a5003c3ff98ebb33e59afec51dd77"
        },
        {
          "url": "https://git.kernel.org/stable/c/02023ff760cc104a5d86a82ef5b8dd89098ad78d"
        },
        {
          "url": "https://git.kernel.org/stable/c/17f89341cb4281d1da0e2fb0de5406ab7c4e25ef"
        }
      ],
      "title": "Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43059",
    "datePublished": "2026-05-05T15:17:25.727Z",
    "dateReserved": "2026-05-01T14:12:55.981Z",
    "dateUpdated": "2026-05-23T16:06:09.898Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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