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Vulnerability record · CVE-2019-19318 · published 28 November 2019

CVE-2019-19318: Linux kernel use after free vulnerability

Linux · Linux Kernel

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,

4.4 CVSS 3.1 Medium EPSS 0.65% · top 50.9% CWE-416 · Use after free
4.4CVSS 3.1 base score, v2 2.1
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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,

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

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-19318), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.