CVE-2026-68391 (GCVE-0-2026-68391)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-10-19 21:09
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF. Use of hci_conn in hci_sync callbacks also needs to hold refcount to avoid UAF. Take appropriate locks for hci_conn lookups, and take refcount for hci_conn pointers stored in mgmt_pending_cmd so that the pointer stays valid. When accessing conn->state, ensure hdev->lock is held to avoid data race.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
Version: 7b445e220db9a2c58be5d09bbbd322abf1b1452a
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Use of hci_conn in hci_sync callbacks also\\nneeds to hold refcount to avoid UAF.\\n\\nTake appropriate locks for hci_conn lookups, and take refcount for\\nhci_conn pointers stored in mgmt_pending_cmd so that the pointer stays\\nvalid.\\n\\nWhen accessing conn-\u003estate, ensure hdev-\u003elock is held to avoid data\\nrace.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.189\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.148\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.101\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.42\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1.6\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.2\", \"versionStartIncluding\": \"6.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-10-03T10:55:46.244Z\"}}}",
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