CVE-2019-19318

Name: CVE-2019-19318
Creator: NVD / NIST
Published: 2019-11-28T00:15:11.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2019-19318 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,

Metrics

CVSS 3.1

4.4/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.65%

46.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	5.0.21
Linux	Linux Kernel	5.3.11
Opensuse	Leap	15.1
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Debian	Debian Linux	9.0
Netapp	Active Iq Unified Manager	>= 9.5
Netapp	Data Availability Services	All versions
Netapp	Hci Management Node	All versions
Netapp	Solidfire	All versions
Netapp	Steelstore Cloud Integrated Storage	All versions
Netapp	Aff A700s Firmware	All versions
Netapp	Fas8300 Firmware	All versions
Netapp	Fas8700 Firmware	All versions
Netapp	Aff A400 Firmware	All versions
Netapp	H610s Firmware	All versions

References

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.htmlMailing List, Third Party Advisory
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
https://usn.ubuntu.com/4414-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.htmlMailing List, Third Party Advisory
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
https://usn.ubuntu.com/4414-1/Third Party Advisory

Timeline

Published: Nov 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19318?

How severe is CVE-2019-19318?

CVE-2019-19318 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19318?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19318?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST