CVE-2019-5603

highpriority · track · 41EPSS 0.006 · 50 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.62% (50th) EPSS

CVSS 7.2 · high

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

In FreeBSD 12.0-STABLE before r350261, 12.0-RELEASE before 12.0-RELEASE-p8, 11.3-STABLE before r350263, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, system calls operating on file descriptors as part of mqueuefs did not properly release the reference allowing a malicious user to overflow the counter allowing access to files, directories, and sockets opened by processes owned by other users.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-404USprimaryCWE-264US

exploits (1)

Public proof-of-concept and weaponised exploit code.

raymontag/CVE-2019-5603Full LPE Exploit for CVE-2019-5603 / FreeBSD-SA-19:15.mqueuefs / FreeBSD-SA-19:24.mqueuefsPoC · poc_in_github

affected products (12)

Products and version ranges known to be affected.

FreeBSD FreeBSD≤ and before 11.2-RELEASE-p12enisa_euvdEU
FreeBSD FreeBSD≤ before 11.3-RELEASE-p1enisa_euvdEU
FreeBSD FreeBSD≤ FreeBSD before 12.0-RELEASE-p8enisa_euvdEU
FreeBSD Project FreeBSD11.2-RELEASE → 11.2-RELEASE-p12fstec_bduRU
FreeBSD Project FreeBSD11.3-RELEASE → 11.3-RELEASE-p1fstec_bduRU
FreeBSD Project FreeBSD11.3-STABLE → r350263fstec_bduRU
FreeBSD Project FreeBSD12.0-RELEASE → 12.0-RELEASE-p8fstec_bduRU
FreeBSD Project FreeBSD12.0-STABLE → 12.0-STABLE r350261fstec_bduRU
freebsd freebsd= 11.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.3nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 12.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2019-07-26modified 2026-06-17

related (2,019)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2023-38180US	—OT critical	14.1% (97th)	KEV	2023-08-08
.NET and Visual Studio Denial of Service Vulnerability
CVE-2018-8639US	high7.8OT critical	22.2% (98th)	KEV	2018-12-12
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." T…
CVE-2018-8611US	high7.8OT critical	4.20% (91st)	KEV	2018-12-12
An elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory, aka "Windows Kernel Elevation of Privilege Vulnerability." This a…
CVE-2018-8406US	high7.8OT critical	3.44% (89th)	KEV	2018-08-15
An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory, aka "DirectX Graphics Kernel Elevation of Pri…
CVE-2018-8405US	high7.8OT critical	3.44% (89th)	KEV	2018-08-15
An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory, aka "DirectX Graphics Kernel Elevation of Pri…

+2014 more

references (24)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan