PT-2021-6920 · Linux+4 · Linux Kernel+4

Sönke Huster · Published 2021-10-20 · Updated 2025-05-05 · CVE-2022-26878

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.16.3

Description The issue is related to a memory leak in the Linux kernel, specifically in the drivers/bluetooth/virtio bt.c file. This memory leak occurs because socket buffers have memory allocated but not freed. The exploitation of this issue can allow a remote attacker to cause a denial of service.

Recommendations For Linux kernel versions prior to 5.16.3, update to version 5.16.3 or later to resolve the memory leak issue. As a temporary workaround, consider restricting access to the vulnerable virtio bt.c driver to minimize the risk of exploitation.

Fix

Missing Release of Resource after Effective Lifetime

Memory Leak

Weakness Enumeration

CWE-772

CWE-401

Related Identifiers

ALT-PU-2022-1171

ALT-PU-2022-1175

ALT-PU-2022-1647

ALT-PU-2022-2155

ALT-PU-2023-1684

ALT-PU-2023-1741

ALT-PU-2023-1814

ALT-PU-2023-4894

AZL-9066

BDU:2022-02677

CVE-2022-26878

USN-5383-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 34

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0617 · Vendor Advisory
• https://lore.kernel.org/linux-bluetooth/1A203F5E-FB5E-430C-BEA3-86B191D69D58%40holtmann.org · Patch
• https://ubuntu.com/security/CVE-2022-24448 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1d0688421449718c6c5f46e458a378c9b530ba18 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-1016 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5383-1 · Vendor Advisory
• http://openwall.com/lists/oss-security/2022/03/11/1 · Patch
• https://ubuntu.com/security/CVE-2022-1015 · Vendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.17 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-44879 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-02677 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-26878 · Security Note
• https://osv.dev/vulnerability/CVE-2022-26878 · Vendor Advisory