PT-2025-40740 · Drbd+2 · Drbd+2

Published 2022-11-15 · Updated 2026-02-05 · CVE-2022-50506

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 (affected versions not specified)

Description A flaw exists in the Linux kernel related to DRBD (Distributed Replicated Block Device). A null pointer dereference can occur when a DRBD device is diskless, specifically during the allocation of a private bio (block I/O) object. This happens because a check for a backing device is missing before attempting to access device->ldev->backing bdev. The issue was addressed by ensuring the private bio is only allocated if a disk is present, preventing the null pointer dereference. The fix involved commit c347a787e34cb.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2022-50506

RHSA-2022:8267

RHSA-2022_8267

RHSA-2023:2458

RHSA-2023_2458

Affected Products

Drbd

Linux Kernel

Red Hat

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50506.json · Exploit
• https://ubuntu.com/security/CVE-2022-50506 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50506 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50506 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-50506 · Vendor Advisory
• https://git.kernel.org/stable/c/6d42ddf7f27b6723549ee6d4c8b1b418b59bf6b5 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50506 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50506 · Security Note
• https://git.kernel.org/stable/c/05580a3bbf3cec677cb00a85dfeb21d6a9b48eaf · Patch
• https://osv.dev/vulnerability/CVE-2022-50506 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2025100422-CVE-2022-50506-1642@gregkh/T · Note
• https://git.kernel.org/linus/6d42ddf7f27b6723549ee6d4c8b1b418b59bf6b5 · Note
• https://twitter.com/CVEnew/status/1974513819927064803 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://t.me/cveNotify/150999 · Telegram Post