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Vulnerability · Published Sep 18, 2025 · Assigned by Linux

CVE-2022-50386Bluetooth: L2CAP: Fix user-after-free

High 8.8

In plain English

A high-severity use-after-free in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.4%top 69.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-abi-stablelists4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-core4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-cross-headers4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-debug4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-debug-core4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-debug-devel4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-debug-modules4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-devel4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-doc4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-headers4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-modules4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-modules-extra4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-rt4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-core4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-debug4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-debug-core4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-devel4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-modules4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.81.1.rt7.422.el8_10ALSA-2025:19103
AlmaLinux:8kernel-tools4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-tools-libs4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-zfcpdump4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8perf4.18.0-553.81.1.el8_10ALSA-2025:19102
AlmaLinux:8python3-perf4.18.0-553.81.1.el8_10ALSA-2025:19102
Debian:12linux6.0.3-1DEBIAN-CVE-2022-50386
Debian:13linux6.0.3-1DEBIAN-CVE-2022-50386
Debian:14linux6.0.3-1DEBIAN-CVE-2022-50386
Rocky Linux:8kernel0:4.18.0-553.81.1.el8_10RLSA-2025:19102
Rocky Linux:8kernel-rt0:4.18.0-553.81.1.rt7.422.el8_10RLSA-2025:19103
Ubuntu:22.04:LTSlinux5.15.0-60.66UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-aws5.15.0-1030.34UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure5.15.0-1033.40UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1033.40.1UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gcp5.15.0-1029.36UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gke5.15.0-1027.32UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1015.19UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-ibm5.15.0-1025.28UBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1025.30UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-kvm5.15.0-1028.33UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-60.66UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1017.17UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oracle5.15.0-1029.35UBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-raspi5.15.0-1024.26UBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50386
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-50386
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-50386

Affected products (as reported)

VendorProductVersions
Linux Linux 3df91ea20e744344100b10ae69a17211fcf5b207 – before 11e40d6c0823f699d8ad501e48d1c3ae4be386cd3df91ea20e744344100b10ae69a17211fcf5b207 – before 843fc4e386dd84b806a7f07fb062d8c3a44e53643df91ea20e744344100b10ae69a17211fcf5b207 – before d91fc2836562f299f34e361e089e9fe154da4f733df91ea20e744344100b10ae69a17211fcf5b207 – before 7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad453df91ea20e744344100b10ae69a17211fcf5b207 – before 0c108cf3ad386e0084277093b55a351c49e0be273df91ea20e744344100b10ae69a17211fcf5b207 – before d1e894f950ad48897d1a7cb05909ea29d8c3810e3df91ea20e744344100b10ae69a17211fcf5b207 – before 6ffde6e03085874ae22263ff4cef4869f797e84f3df91ea20e744344100b10ae69a17211fcf5b207 – before 15fc21695eb606bdc5d483b92118ee42610a952d
Linux Linux 3.4

Weakness: CWE-416 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References