High 8.3Published Dec 9, 2016

CVE-2016-5423PostgreSQL before 9.1.23, 9.2.x before 9.2.18, 9.3.x before 9.3.14, 9.4.x before 9.4.9, and 9.5.x before 9.5.4 allow remote authenticated users to cause a denial of service (NULL pointer dereference…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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PostgreSQL before 9.1.23, 9.2.x before 9.2.18, 9.3.x before 9.3.14, 9.4.x before 9.4.9, and 9.5.x before 9.5.4 allow remote authenticated users to cause a denial of service (NULL pointer dereference and server crash), obtain sensitive memory information, or possibly execute arbitrary code via (1) a CASE expression within the test value subexpression of another CASE or (2) inlining of an SQL function that implements the equality operator used for a CASE expression involving values of different types.

CVSS: 8.3 HIGH (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

debian debian_linux debian:debian_linux	8.0	NVD
postgresql postgresql postgresql:postgresql	through 9.1.22; 9.2; 9.2.1; 9.2.2; 9.2.3; 9.2.4; 9.2.5; 9.2.6; and 38 more ranges	NVD

References

References

http://rhn.redhat.com/errata/RHSA-2016-1781.html
http://rhn.redhat.com/errata/RHSA-2016-1820.html
http://rhn.redhat.com/errata/RHSA-2016-1821.html
http://rhn.redhat.com/errata/RHSA-2016-2606.html
http://www.debian.org/security/2016/dsa-3646	third-party-advisory
http://www.securityfocus.com/bid/92433	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1036617	third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHSA-2017:2425
https://bugzilla.redhat.com/show_bug.cgi?id=1364001	issue-tracking, third-party-advisory, vdb-entry
https://security.gentoo.org/glsa/201701-33
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