CVE-2019-5603

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-26 · updated 2026-06-17
Weakness: CWE-404

Description

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.

Affected products

FreeBSD: 11.0, 11.2, 11.2-p10, 11.2-p11, 11.2-p2, 11.2-p3 (+16)

References

http://packetstormsecurity.com/files/153752/FreeBSD-Security-Advisory-FreeBSD-SA-19-15.mqueuefs.html
http://packetstormsecurity.com/files/154172/FreeBSD-Security-Advisory-FreeBSD-SA-19-24.mqueuefs.html
https://seclists.org/bugtraq/2019/Aug/35
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:15.mqueuefs.asc
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:24.mqueuefs.asc
https://security.netapp.com/advisory/ntap-20190814-0003/
http://packetstormsecurity.com/files/153752/FreeBSD-Security-Advisory-FreeBSD-SA-19-15.mqueuefs.html
http://packetstormsecurity.com/files/154172/FreeBSD-Security-Advisory-FreeBSD-SA-19-24.mqueuefs.html
https://seclists.org/bugtraq/2019/Aug/35
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:15.mqueuefs.asc
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:24.mqueuefs.asc
https://security.netapp.com/advisory/ntap-20190814-0003/

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