HOMEVULNERABILITIESCVE-2019-19448
HIGH

CVE-2019-19448

CWE-416Published: December 8, 2019· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

NVD Source

Technical Analysis

CVE-2019-19448 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

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.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp24 product(s)
active iq unified managercloud backupdata availability serviceshci management nodesolidfiresteelstore cloud integrated storagea700s firmwarea700sfas 8300 firmwarefas 8300fas 8700 firmwarefas 8700+12
Source: NVD CPE · 29 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

ADVISORYhttps://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200103-0001/
ADVISORYhttps://usn.ubuntu.com/4578-1/
ADVISORYhttps://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20200103-0001/
ADVISORYhttps://usn.ubuntu.com/4578-1/

All References (12)

→
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448Exploit · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
→
https://usn.ubuntu.com/4578-1/Third Party Advisory
→
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448Exploit · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
→
https://usn.ubuntu.com/4578-1/Third Party Advisory

Quick Facts

CVE IDCVE-2019-19448
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected4 vendor(s)
PublishedDec 8, 2019

Related CVEs (CWE-416)

CVE-2012-1973
10.0
CVE-2012-1972
10.0
CVE-2010-3116
10.0
CVE-2010-2302
10.0
CVE-2010-3252
10.0
CVE-2012-1974
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-19448 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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