Linux Kernel up to 6.0.2 l2cap_core.c l2cap_chan_hold_unless_zero use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.0.2. The impacted element is the function l2cap_chan_hold_unless_zero of the file l2cap_core.c. Executing a manipulation can lead to use after free. This vulnerability is handled as CVE-2022-50386. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.0.2. It has been declared as critical. This vulnerability affects the function l2cap_chan_hold_unless_zero of the file l2cap_core.c. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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

The advisory is available at git.kernel.org. This vulnerability was named CVE-2022-50386 since 09/17/2025. The exploitation appears to be easy. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/12/2025).

The vulnerability scanner Nessus provides a plugin with the ID 265541 (Linux Distros Unpatched Vulnerability : CVE-2022-50386), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17 or 6.0.3 eliminates this vulnerability. Applying the patch 11e40d6c0823f699d8ad501e48d1c3ae4be386cd/843fc4e386dd84b806a7f07fb062d8c3a44e5364/d91fc2836562f299f34e361e089e9fe154da4f73/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45/0c108cf3ad386e0084277093b55a351c49e0be27/d1e894f950ad48897d1a7cb05909ea29d8c3810e/6ffde6e03085874ae22263ff4cef4869f797e84f/15fc21695eb606bdc5d483b92118ee42610a952d/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (265541) and CERT Bund (WID-SEC-2025-2092). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.0
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265541
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-50386

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.9.331/4.14.296/4.19.262/5.4.220/5.10.150/5.15.75/5.19.17/6.0.3
Patch: 11e40d6c0823f699d8ad501e48d1c3ae4be386cd/843fc4e386dd84b806a7f07fb062d8c3a44e5364/d91fc2836562f299f34e361e089e9fe154da4f73/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45/0c108cf3ad386e0084277093b55a351c49e0be27/d1e894f950ad48897d1a7cb05909ea29d8c3810e/6ffde6e03085874ae22263ff4cef4869f797e84f/15fc21695eb606bdc5d483b92118ee42610a952d/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f

Timelineinfo

09/17/2025 CVE reserved
09/18/2025 +1 days Advisory disclosed
09/18/2025 +0 days VulDB entry created
12/12/2025 +85 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-50386 (🔒)
GCVE (CVE): GCVE-0-2022-50386
GCVE (VulDB): GCVE-100-324826
CERT Bund: WID-SEC-2025-2092 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/18/2025 16:17
Updated: 12/12/2025 17:57
Changes: 09/18/2025 16:17 (59), 09/19/2025 18:57 (7), 09/22/2025 01:46 (2), 11/29/2025 11:28 (1), 12/12/2025 17:57 (10)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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