Vulnerability-Lookup

FKIE_CVE-2026-80764

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix LE list UAF on reset hci_cc_reset() clears the LE accept and resolving lists without taking hdev->lock. Other command-complete handlers serialize updates to these lists with that lock, and the debugfs readers hold it while walking them. This permits the reset completion and a debugfs read to interleave as follows: hci_rx_work debugfs reader ----------- -------------- lock hdev->lock fetch current entry list_del(entry) kfree(entry) read entry fields The reader then dereferences a freed list entry and may follow its stale next pointer. KASAN reported: BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180 Read of size 1 at addr ffff8881015dab16 by task poc/95 Call Trace: white_list_show+0x15f/0x180 seq_read_iter+0x3ff/0x1190 seq_read+0x267/0x3d0 vfs_read+0x177/0xa20 ksys_read+0xf7/0x1c0 Allocated by task 91: hci_bdaddr_list_add+0x1a6/0x3a0 hci_cc_le_add_to_accept_list+0xab/0x140 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Freed by task 90: kfree+0x131/0x3c0 hci_bdaddr_list_clear+0xd8/0x160 hci_cc_reset+0x28a/0x370 hci_cmd_complete_evt+0x26c/0x9a0 hci_event_packet+0x454/0xb20 hci_rx_work+0x293/0x730 Take hdev->lock around both list clears. This matches the existing mutation and traversal locking convention.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8e68c380290b1dd64a0a512ce66d0264130c46ed",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "d57702d4c55633c243da5a2fec37ae2ad4adb621",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "25b05e3ce31d954540e99954bcc66cbceb27ab35",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "33af47e847fe4a28b109673affb5874015d54f5a",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0de8cd646b0152c9ddd10257d8284938d0df0181",
              "versionType": "git"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev-\u003elock. Other command-complete handlers serialize updates to these\nlists with that lock, and the debugfs readers hold it while walking them.\n\nThis permits the reset completion and a debugfs read to interleave as\nfollows:\n\n  hci_rx_work                 debugfs reader\n  -----------                 --------------\n                              lock hdev-\u003elock\n                              fetch current entry\n  list_del(entry)\n  kfree(entry)\n                              read entry fields\n\nThe reader then dereferences a freed list entry and may follow its stale\nnext pointer.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180\n  Read of size 1 at addr ffff8881015dab16 by task poc/95\n\n  Call Trace:\n   white_list_show+0x15f/0x180\n   seq_read_iter+0x3ff/0x1190\n   seq_read+0x267/0x3d0\n   vfs_read+0x177/0xa20\n   ksys_read+0xf7/0x1c0\n\n  Allocated by task 91:\n   hci_bdaddr_list_add+0x1a6/0x3a0\n   hci_cc_le_add_to_accept_list+0xab/0x140\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\n  Freed by task 90:\n   kfree+0x131/0x3c0\n   hci_bdaddr_list_clear+0xd8/0x160\n   hci_cc_reset+0x28a/0x370\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\nTake hdev-\u003elock around both list clears. This matches the existing\nmutation and traversal locking convention."
    }
  ],
  "id": "CVE-2026-80764",
  "lastModified": "2026-09-04T16:18:01.617",
  "metrics": {},
  "published": "2026-09-04T16:18:01.617",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80764 (GCVE-0-2026-80764)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12

Title

Bluetooth: hci_event: fix LE list UAF on reset

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/8e68c380290b1dd64…
https://git.kernel.org/stable/c/0628cc9b2fa29985a…
https://git.kernel.org/stable/c/d57702d4c55633c24…
https://git.kernel.org/stable/c/39a3afb91be3cb465…
https://git.kernel.org/stable/c/b55e83a4ba31d40de…
https://git.kernel.org/stable/c/25b05e3ce31d95454…
https://git.kernel.org/stable/c/33af47e847fe4a28b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < 8e68c380290b1dd64a0a512ce66d0264130c46ed (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < 0628cc9b2fa29985a7b8c774741f8a736b0f5e7c (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < d57702d4c55633c243da5a2fec37ae2ad4adb621 (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < 39a3afb91be3cb465f46ce7a8e5696d9e33edf93 (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < b55e83a4ba31d40deae22d4e4dc8c84083e953c6 (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < 25b05e3ce31d954540e99954bcc66cbceb27ab35 (git) Affected: a4d5504d5c39cc84f1f828e19967595597a8136e , < 33af47e847fe4a28b109673affb5874015d54f5a (git) Affected: 0de8cd646b0152c9ddd10257d8284938d0df0181 (git) Affected: 3.18.3 , < 3.19 (semver)
Linux	Linux	Affected: 3.19 Unaffected: 0 , < 3.19 (semver) Unaffected: 6.1.185 , ≤ 6.1.* (semver) Unaffected: 6.6.154 , ≤ 6.6.* (semver) Unaffected: 6.12.106 , ≤ 6.12.* (semver) Unaffected: 6.18.47 , ≤ 6.18.* (semver) Unaffected: 7.1.11 , ≤ 7.1.* (semver) Unaffected: 7.2.1 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8e68c380290b1dd64a0a512ce66d0264130c46ed",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "0628cc9b2fa29985a7b8c774741f8a736b0f5e7c",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "d57702d4c55633c243da5a2fec37ae2ad4adb621",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "39a3afb91be3cb465f46ce7a8e5696d9e33edf93",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "b55e83a4ba31d40deae22d4e4dc8c84083e953c6",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "25b05e3ce31d954540e99954bcc66cbceb27ab35",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "lessThan": "33af47e847fe4a28b109673affb5874015d54f5a",
              "status": "affected",
              "version": "a4d5504d5c39cc84f1f828e19967595597a8136e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0de8cd646b0152c9ddd10257d8284938d0df0181",
              "versionType": "git"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.185",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.154",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.106",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.47",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.11",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.1",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "3.18.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix LE list UAF on reset\n\nhci_cc_reset() clears the LE accept and resolving lists without taking\nhdev-\u003elock. Other command-complete handlers serialize updates to these\nlists with that lock, and the debugfs readers hold it while walking them.\n\nThis permits the reset completion and a debugfs read to interleave as\nfollows:\n\n  hci_rx_work                 debugfs reader\n  -----------                 --------------\n                              lock hdev-\u003elock\n                              fetch current entry\n  list_del(entry)\n  kfree(entry)\n                              read entry fields\n\nThe reader then dereferences a freed list entry and may follow its stale\nnext pointer.\n\nKASAN reported:\n\n  BUG: KASAN: slab-use-after-free in white_list_show+0x15f/0x180\n  Read of size 1 at addr ffff8881015dab16 by task poc/95\n\n  Call Trace:\n   white_list_show+0x15f/0x180\n   seq_read_iter+0x3ff/0x1190\n   seq_read+0x267/0x3d0\n   vfs_read+0x177/0xa20\n   ksys_read+0xf7/0x1c0\n\n  Allocated by task 91:\n   hci_bdaddr_list_add+0x1a6/0x3a0\n   hci_cc_le_add_to_accept_list+0xab/0x140\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\n  Freed by task 90:\n   kfree+0x131/0x3c0\n   hci_bdaddr_list_clear+0xd8/0x160\n   hci_cc_reset+0x28a/0x370\n   hci_cmd_complete_evt+0x26c/0x9a0\n   hci_event_packet+0x454/0xb20\n   hci_rx_work+0x293/0x730\n\nTake hdev-\u003elock around both list clears. This matches the existing\nmutation and traversal locking convention."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:36.599Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621"
        },
        {
          "url": "https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93"
        },
        {
          "url": "https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35"
        },
        {
          "url": "https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"
        }
      ],
      "title": "Bluetooth: hci_event: fix LE list UAF on reset",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80764",
    "datePublished": "2026-09-04T15:12:36.599Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-09-04T15:12:36.599Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2026-80764

CVE-2026-80764 (GCVE-0-2026-80764)

Tags

Sightings

Nomenclature

Related by attack behaviour