Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER When protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls hci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm() assumes it is held, and if conn is deleted concurrently -> UAF. Only SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen, and HCI_EV_CONN_REQUEST is not generated for ISO. In the non-deferred listening socket code paths, hci_connect_cfm(conn) is called with hdev->lock held. Fix by holding the lock.
CVE-2026-53072
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53072
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "c7777f534a8018ae4bb1c80d8925af4df588a314",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "6b4d226d01ab7da0d2027a2a1e3a6079152e5065",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "385b2d0468a0871fc716c549fa3b0c257c7dbcb3",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "c27224daf0b08efbb2b24ed64b6139b294f5473a",
"versionType": "git"
},
{
"status": "affected",
"version": "70c464256310e1c3716099b9d02ece4169272f73",
"lessThan": "5c7209a341ff2ac338b2b0375c34a307b37c9ac2",
"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.91",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_event.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53072
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40743 · Revision 1
- Added to Heist Feed
- Publisher date