PT-2019-6376 · Linux+2 · Linux Kernel+2

Published 2019-06-21 · Updated 2026-05-26 · CVE-2019-19378

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel version 5.0.21

Description The issue is related to the index rbio pages() function in the fs/btrfs/raid56.c module of the btrfs filesystem in the Linux operating system. It involves a slab-out-of-bounds write access when mounting a crafted btrfs filesystem image. This can potentially allow an attacker to impact the confidentiality, integrity, and availability of protected information.

Recommendations For Linux kernel version 5.0.21, consider disabling the index rbio pages() function as a temporary workaround until a patch is available. Restrict access to the fs/btrfs/raid56.c module to minimize the risk of exploitation. Avoid using crafted btrfs filesystem images until the issue is resolved.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALSA-2025_12746

ALSA-2025_12752

ALSA-2025_12753

ALSA-2025_16880

ALT-PU-2019-2120

ALT-PU-2019-2311

BDU:2023-04664

CVE-2019-19378

ECHO-E950-4129-352D

Affected Products

Alt Linux

Debian

Linux Kernel

References · 17

• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19378 · Exploit
• https://osv.dev/vulnerability/CVE-2019-19378 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2019-19378 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19378 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-19378 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-04664 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2019-19378 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-19378 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-19378 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2019-19378 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2019-19378 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-19378 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-19378 · Security Note
• https://security.netapp.com/advisory/ntap-20200103-0001 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=1781899 · Note