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CVE-2016-5423

30
FAUCET Score

CVE-2016-5423 is a high-severity vulnerability affecting PostgreSQL versions before 9.1.23, 9.2.18, 9.3.14, 9.4.9, and 9.5.4, including Debian distributions. It allows remote authenticated users to trigger a denial of service (NULL pointer dereference and server crash), disclose sensitive memory information, or potentially execute arbitrary code. The attack vector is network-based with low complexity, requiring authenticated access, and has a CVSS score of 8.3. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
<= 9.1.22CPE matchmatch criteria
cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*
9.2CPE matchmatch criteria
cpe:2.3:a:postgresql:postgresql:9.2:*:*:*:*:*:*:*
9.2.1CPE matchmatch criteria
cpe:2.3:a:postgresql:postgresql:9.2.1:*:*:*:*:*:*:*
9.2.2CPE matchmatch criteria
cpe:2.3:a:postgresql:postgresql:9.2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.3HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.96%
Probability of exploitation in next 30 days
EPSS Percentile
92.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0596 is in the 92nd percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (31)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: postgresql-0:9.2.18-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: rh-postgresql95-0:2.2-3.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: rh-postgresql95-postgresql-0:9.5.7-2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: spacewalk-backend-0:2.3.3-53.el6sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: spacewalk-postgresql-server-0:9.5-1.el6sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: spacewalk-setup-postgresql-0:2.3.0-27.el6sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: spacewalk-utils-0:2.3.2-32.el6sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 5.7Fixed in: spacewalk-web-0:2.3.2-35.el6sat
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-postgresql94-postgresql-0:9.4.9-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: postgresql92-postgresql-0:9.2.18-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-postgresql95-postgresql-0:9.5.4-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: rh-postgresql94-postgresql-0:9.4.9-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: postgresql92-postgresql-0:9.2.18-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUSFixed in: rh-postgresql95-postgresql-0:9.5.4-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-postgresql94-postgresql-0:9.4.9-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: postgresql92-postgresql-0:9.2.18-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-postgresql95-postgresql-0:9.5.4-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-postgresql94-postgresql-0:9.4.9-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: postgresql92-postgresql-0:9.2.18-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-postgresql95-postgresql-0:9.5.4-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: rh-postgresql94-postgresql-0:9.4.9-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: postgresql92-postgresql-0:9.2.18-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUSFixed in: rh-postgresql95-postgresql-0:9.5.4-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-postgresql94-postgresql-0:9.4.9-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: postgresql92-postgresql-0:9.2.18-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-postgresql95-postgresql-0:9.5.4-1.el7
View patch
redhatno patchvia redhat_api
Product: CloudForms Management Engine 5Fixed in: postgresql
redhatno patchvia redhat_api
Product: CloudForms Management Engine 5Fixed in: postgresql92-postgresql
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: postgresql
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: postgresql84
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: postgresql

Vendor Advisories (1)

redhatCVE-2016-5423Moderate

postgresql: CASE/WHEN with inlining can cause untrusted pointer dereference

Aug 11, 2016

References

rhn.redhat.com / errata/RHSA-2016-1781.html
rhn.redhat.com / errata/RHSA-2016-1820.html
rhn.redhat.com / errata/RHSA-2016-1821.html
rhn.redhat.com / errata/RHSA-2016-2606.html
access.redhat.com / errata/RHSA-2017:2425
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry
security.gentoo.org / glsa/201701-33
postgresql.org / about/news/1688
PatchVendor Advisory
postgresql.org / docs/current/static/release-9-1-23.html
Release NotesVendor Advisory
postgresql.org / docs/current/static/release-9-2-18.html
Release NotesVendor Advisory
postgresql.org / docs/current/static/release-9-3-14.html
Release NotesVendor Advisory
postgresql.org / docs/current/static/release-9-4-9.html
Release NotesVendor Advisory
postgresql.org / docs/current/static/release-9-5-4.html
Release NotesVendor Advisory
debian.org / security/2016/dsa-3646
Third Party Advisory
securityfocus.com / bid/92433
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036617
Third Party AdvisoryVDB Entry