HOMEVULNERABILITIESCVE-2019-25044
HIGH

CVE-2019-25044

CWE-416Published: May 14, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

The block subsystem in the Linux kernel before 5.2 has a use-after-free that can lead to arbitrary code execution in the kernel context and privilege escalation, aka CID-c3e2219216c9. This is related to blk_mq_free_rqs and blk_cleanup_queue.

NVD Source

Technical Analysis

CVE-2019-25044 requires local access, meaning attackers must already have a foothold on the target system.

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

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.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp20 product(s)
cloud backupsolidfire \& hci management nodesolidfire baseboard management controller firmwaresolidfire baseboard management controllerh300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300e+8
Source: NVD CPE · 21 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

PATCHhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6
PATCHhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6
ADVISORYhttps://security.netapp.com/advisory/ntap-20210629-0006/
ADVISORYhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqs
ADVISORYhttps://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213
ADVISORYhttps://security.netapp.com/advisory/ntap-20210629-0006/
ADVISORYhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqs
ADVISORYhttps://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213

All References (10)

→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2Patch · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6Mailing List · Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210629-0006/Third Party Advisory
→
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqsThird Party Advisory
→
https://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213Exploit · Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2Patch · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6Mailing List · Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210629-0006/Third Party Advisory
→
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqsThird Party Advisory
→
https://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-25044
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-416
CISA KEVNo
Affected2 vendor(s)
PublishedMay 14, 2021

Related CVEs (CWE-416)

CVE-2015-6687
10.0
CVE-2015-6691
10.0
CVE-2015-6683
10.0
CVE-2015-5586
10.0
CVE-2015-6684
10.0
CVE-2016-6082
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-25044 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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