Bluetooth: hci_sync: Fix accept list UAF during suspend
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix accept list UAF during suspend hci_update_event_filter_sync() walks hdev->accept_list while sending a synchronous HCI command for each remote-wakeup device. The suspend path holds hdev->req_lock, but accept-list updates are serialized by hdev->lock. Consequently, remove_device() can free the current list entry during the controller wait. The following interleaving causes the use-after-free: hci_update_event_filter_sync() remove_device() fetch accept-list entry hci_set_event_filter_sync() wait for controller response hci_dev_lock() list_del() kfree() hci_dev_unlock() read the freed list.next KASAN reported: BUG: KASAN: slab-use-after-free in hci_suspend_sync+0x835/0x910 Read of size 8 at addr ffff88810bec8440 by task kworker/0:1/10 Workqueue: events vhci_suspend_work Call Trace: hci_suspend_sync+0x835/0x910 hci_suspend_dev+0x182/0x450 process_one_work+0x661/0x1090 worker_thread+0x45b/0xd10 Allocated by task 86: hci_bdaddr_list_add_with_flags+0x1a8/0x400 add_device+0x381/0x820 hci_sock_sendmsg+0x1033/0x1ea0 Freed by task 91: kfree+0x131/0x3c0 remove_device+0x429/0xb70 hci_sock_sendmsg+0x1033/0x1ea0 Snapshot the remote-wakeup addresses under hdev->lock. Release the lock before sending HCI commands. Clear the controller event filter before building the snapshot, and skip allocation and the second list traversal when there are no matching entries. This preserves the original filter and sca
CVE-2026-80762
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-2026-80762
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": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "bb5f5414d1a6272a16f68684e998f4063dd19f57",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "b5181516a9f5c2fdb3271cdad72a5b16c6963a44",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "87ad116ac3abc6f2ce2b5b6c488f633003581eee",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "fe93a697a7a92fa9adf78c9ff67a10db3193290c",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "95bb57bc11a91caf042ad00fca85e480d3fda37f",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "29c59212a507804d7616b8abf491d30b4ab8e75f",
"versionType": "git"
},
{
"status": "affected",
"version": "182ee45da083db4e3e621541ccf255bfa9652214",
"lessThan": "f57b399c4fa1501b2d5451f52d861ece86bcf3db",
"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80762
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34780 · Revision 1
- Added to Heist Feed
- Publisher date