Bluetooth: L2CAP: Fix user-after-free
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.14.296, 4.19.262, 4.9.331, 5.10.150, 5.15.75, 5.19.17, 5.4.220, 6.0.3
- CVEs
- CVE-2022-50386
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:15 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389
osv:CVE-2022-50386
Kernel
Fixed versions: 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3
Complete source record
{
"id": "feb612af35d86705defc356c544a310ef482834871d254932cae6545bbdc4d17",
"url": "https://osv.dev/vulnerability/CVE-2022-50386",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Bluetooth: L2CAP: Fix user-after-free",
"summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389",
"evidence": "osv:CVE-2022-50386",
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"aliases": [
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
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"affected": [
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"modified": "2026-10-28T02:30:42.364955531Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27",
"https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd",
"https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d",
"https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f",
"https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f",
"https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45",
"https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364",
"https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e",
"https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50386.json",
"https://nvd.nist.gov/vuln/detail/CVE-2022-50386",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50386.json"
}
},
"related_cves": [
{
"value": "CVE-2022-50386",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 509752,
"published_at": "2025-09-18T13:33:07.191+00:00"
}