HOMEVULNERABILITIESCVE-2019-19318
MEDIUM

CVE-2019-19318

CWE-416Published: November 28, 2019· Updated: Jun 17, 2026

4.4
CVSS v3.1

Official 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,

NVD Source

Technical Analysis

CVE-2019-19318 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 4.4.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp15 product(s)
active iq unified managerdata availability serviceshci management nodesolidfiresteelstore cloud integrated storageaff a700s firmwareaff a700sfas8300 firmwarefas8300fas8700 firmwarefas8700aff a400 firmware+3
openSUSE1 product(s)
leap
Source: NVD CPE · 22 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
ADVISORYhttps://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200103-0001/
ADVISORYhttps://usn.ubuntu.com/4414-1/
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
ADVISORYhttps://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19318
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200103-0001/
ADVISORYhttps://usn.ubuntu.com/4414-1/

All References (10)

→
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

Quick Facts

CVE IDCVE-2019-19318
CVSS Score4.4 / 10
SeverityMEDIUM
WeaknessCWE-416
CISA KEVNo
Affected5 vendor(s)
PublishedNov 28, 2019

Related CVEs (CWE-416)

CVE-2012-1976
10.0
CVE-2012-1974
10.0
CVE-2012-1973
10.0
CVE-2012-1975
10.0
CVE-2012-1972
10.0
CVE-2012-3956
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-19318 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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