CVE-2019-5606

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

In FreeBSD 12.0-STABLE before r349805, 12.0-RELEASE before 12.0-RELEASE-p8, 11.3-STABLE before r349806, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, code which handles close of a descriptor created by posix_openpt fails to undo a signal configuration. This causes an incorrect signal to be raised leading to a write after free of kernel memory allowing a malicious user to gain root privileges or escape a jail.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
FreeBSD	FreeBSD	FreeBSD before 12.0-RELEASE-p8; before 11.3-RELEASE-p1; and before 11.2-RELEASE-p12

References

http://packetstormsecurity.com/files/153748/FreeBSD-Security-Advisory-FreeBSD-SA-19-13.pts.htmlThird Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:13.pts.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20190814-0003/Third Party Advisory
http://packetstormsecurity.com/files/153748/FreeBSD-Security-Advisory-FreeBSD-SA-19-13.pts.htmlThird Party Advisory, VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:13.pts.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20190814-0003/Third Party Advisory

Timeline

Published: Jul 26, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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