PT-2019-4424 · Linux+2 · Linux Kernel+2

Published 2019-02-25 · Updated 2025-09-29 · CVE-2019-18885

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 5.1

Description The issue is related to a NULL pointer dereference in the fs/btrfs/volumes.c file of the Linux kernel. This occurs due to mishandling of fs devices->devices within the find device function, which can be exploited by a crafted btrfs image. The exploitation of this issue may allow an attacker to cause a denial of service.

Recommendations For Linux kernel versions prior to 5.1, update to version 5.1 or later to resolve the issue. At the moment, there is no information about additional mitigation measures for this specific issue.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2025_12746

ALSA-2025_12752

ALSA-2025_12753

ALSA-2025_16880

ALT-PU-2019-1893

ALT-PU-2019-1896

ALT-PU-2019-2120

ALT-PU-2019-2311

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2020-00167

CVE-2019-18885

DLA-2323-1

ELSA-2020-5844

ELSA-2020-5845

ELSA-2020-5866

ELSA-2020-5885

USN-4254-1

USN-4254-2

USN-4258-1

USN-4287-1

USN-4287-2

Affected Products

Alt Linux

Linux Kernel

Ubuntu

References · 63

• 🔥 https://github.com/bobfuzzer/CVE-2019-18885 · Exploit
• https://github.com/torvalds/linux/commit/09ba3bc9dd150457c506e4661380a6183af651c1 · Patch
• https://osv.dev/vulnerability/USN-4287-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-5885.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-20096 · Vendor Advisory
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=09ba3bc9dd150457c506e4661380a6183af651c1 · Patch
• https://ubuntu.com/security/CVE-2020-7053 · Vendor Advisory
• https://usn.ubuntu.com/4254-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19332 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4287-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-18885 · Security Note
• https://ubuntu.com/security/CVE-2019-19062 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4254-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18683 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18885 · Vendor Advisory