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CVE-2022-50386

Bluetooth: L2CAP: Fix user-after-free

HIGH
8
CVSS Score
Published: September 18, 2025 at 01:33 PM UTC
Updated: August 5, 2026 at 09:24 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
v < 4.9.3313.4 ≤ v < 4.14.2963.4 ≤ v < 4.19.2623.4 ≤ v < 4.9.3313.4 ≤ v < 5.10.1503.4 ≤ v < 5.15.753.4 ≤ v < 5.19.173.4 ≤ v < 5.4.2203.4 ≤ v < 6.0.33.4 ≤ v < 6.14.10 ≤ v < 4.14.2964.15 ≤ v < 4.19.2624.20 ≤ v < 5.4.2205.11 ≤ v < 5.15.755.16 ≤ v < 5.19.175.5 ≤ v < 5.10.1506.0 ≤ v < 6.0.33.43df91ea20e744344100b10ae69a17211fcf5b207
Vendor states this is fixed in 0c108cf3ad386e0084277093b55a351c49e0be27 (fixed)
Vendor states this is fixed in 11e40d6c0823f699d8ad501e48d1c3ae4be386cd (fixed)
Vendor states this is fixed in 15fc21695eb606bdc5d483b92118ee42610a952d (fixed)
Vendor states this is fixed in 35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f (fixed)
Vendor states this is fixed in 6ffde6e03085874ae22263ff4cef4869f797e84f (fixed)
Vendor states this is fixed in 7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45 (fixed)
Vendor states this is fixed in 843fc4e386dd84b806a7f07fb062d8c3a44e5364 (fixed)
Vendor states this is fixed in d1e894f950ad48897d1a7cb05909ea29d8c3810e (fixed)
Vendor states this is fixed in d91fc2836562f299f34e361e089e9fe154da4f73 (fixed)
Vendor states this is fixed in 3.4 (unaffected)
Vendor states this is fixed in 4.14.296 (unaffected)
Vendor states this is fixed in 4.19.262 (unaffected)
Vendor states this is fixed in 4.9.331 (unaffected)
Vendor states this is fixed in 5.10.150 (unaffected)
Vendor states this is fixed in 5.15.75 (unaffected)
Vendor states this is fixed in 5.19.17 (unaffected)
Vendor states this is fixed in 5.4.220 (unaffected)
Vendor states this is fixed in 6.0.3 (unaffected)
Vendor states this is fixed in 6.1 (unaffected)

References (9)

Patch
Source: cverecord
https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd
Patch
Source: cverecord
https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364
Patch
Source: cverecord
https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73
Patch
Source: cverecord
https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45
Patch
Source: cverecord
https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27
Patch
Source: cverecord
https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e
Patch
Source: cverecord
https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f
Patch
Source: cverecord
https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8HIGHCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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