PT-2022-5266 · Linux+8 · Linux Kernel+8

Zhengchao Shao · Published 2022-10-17 · Updated 2025-07-10 · CVE-2022-3640

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux Kernel (affected versions not specified)

Description The issue is related to the function l2cap conn del() in the file net/bluetooth/l2cap core.c of the Linux Kernel's Bluetooth component. It involves the use of memory after it has been freed, which can be exploited by a remote attacker to execute arbitrary code. The manipulation leads to a use-after-free condition.

Recommendations To fix this issue, it is recommended to apply a patch. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Use After Free

Weakness Enumeration

CWE-119

CWE-416

Related Identifiers

ALSA-2023:2148

ALSA-2023:2458

ALSA-2023:7077

ALT-PU-2022-3055

ALT-PU-2022-3060

ALT-PU-2022-3061

ALT-PU-2022-3094

ALT-PU-2022-3171

ALT-PU-2022-3172

ALT-PU-2022-3203

ALT-PU-2022-3212

ALT-PU-2022-3226

ALT-PU-2022-3310

ALT-PU-2022-3311

ALT-PU-2022-3364

ALT-PU-2022-3371

ALT-PU-2023-7007

ALT-PU-2023-7682

BDU:2022-06550

CESA-2023_6901

CESA-2023_7077

CVE-2022-3640

DLA-3244-1

DLA-3245-1

OPENSUSE-SU-2022_3897-1

OPENSUSE-SU-2022_3998-1

OPENSUSE-SU-2022_4053-1

OPENSUSE-SU-2022_4072-1

OPENSUSE-SU-2022_4617-1

OPENSUSE-SU-2024:12456-1

OPENSUSE-SU-2024:13704-1

RHSA-2023:2148

RHSA-2023:2458

RHSA-2023:6901

RHSA-2023:7077

RHSA-2023_2148

RHSA-2023_2458

RHSA-2023_6901

RHSA-2023_7077

RHSA-2024:1877

RHSA-2024:2621

RHSA-2025:22910

RHSA-2025:22914

SUSE-SU-2022:3897-1

SUSE-SU-2022:3929-1

SUSE-SU-2022:3998-1

SUSE-SU-2022:4053-1

SUSE-SU-2022:4072-1

SUSE-SU-2022:4516-1

SUSE-SU-2022:4517-1

SUSE-SU-2022:4544-1

SUSE-SU-2022:4559-1

SUSE-SU-2022:4560-1

SUSE-SU-2022:4617-1

SUSE-SU-2025:01918-1

SUSE-SU-2025:01966-1

SUSE-SU-2025:02173-1

SUSE-SU-2025:02262-1

SUSE-SU-2025:2173-1

SUSE-SU-2025_02173-1

SUSE-SU-2025_02262-1

USN-5850-1

USN-5851-1

USN-5853-1

USN-5860-1

USN-5874-1

USN-5875-1

USN-5876-1

USN-5877-1

USN-5878-1

USN-5879-1

USN-5883-1

USN-5909-1

USN-5918-1

USN-5919-1

USN-5920-1

USN-5924-1

USN-5925-1

USN-5927-1

USN-5975-1

USN-6007-1

USN-7607-1

USN-7607-2

USN-7607-3

Affected Products

Alt Linux

Almalinux

Astra Linux

Centos

Linux Kernel

Linuxmint

Red Hat

Suse

Ubuntu

References · 1403

• 🔥 https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=42cf46dea905a80f6de218e837ba4d4cc33d6979 · Exploit
• https://ubuntu.com/security/notices/USN-5919-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3245-1 · Vendor Advisory
• https://errata.almalinux.org/9/ALSA-2023-2458.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-20369 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-4378 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3521 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3586 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-3640 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-0045 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-41218 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5920-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-43945 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-39188 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5851-1 · Vendor Advisory