Home / mailings [USN-8653-1] PostgreSQL vulnerabilities
Posted on 20 August 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-8653-1
August 20, 2026
postgresql-14, postgresql-16, postgresql-18 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in PostgreSQL.
Software Description:
- postgresql-18: Object-relational SQL database
- postgresql-16: Object-relational SQL database
- postgresql-14: Object-relational SQL database
Details:
It was discovered that PostgreSQL incorrectly handled COPY FROM STDIN when
an early failure occurred. An authenticated user could possibly use this
issue to execute arbitrary SQL commands. (CVE-2026-6464)
It was discovered that PostgreSQL incorrectly reset extended statistics
ownership during ALTER TABLE ALTER TYPE operations. An attacker could
possibly use this issue to obtain sensitive information or gain unintended
privileges. (CVE-2026-6469)
It was discovered that PostgreSQL failed to check the USAGE privilege on
types. An authenticated user could possibly use this issue to obtain
sensitive information. (CVE-2026-6470)
It was discovered that PostgreSQL logical decoding could load arbitrary
shared libraries. An authenticated user could possibly use this issue to
execute arbitrary code. (CVE-2026-6471)
It was discovered that PostgreSQL had integer wraparound issues in tsvector
and tsquery allocations. An authenticated user could possibly use this
issue to execute arbitrary code. (CVE-2026-14662)
It was discovered that PostgreSQL pgcrypto silently used cleartext when
OpenSSL-disabled ciphers were requested. An authenticated user could
possibly use this issue to obtain sensitive information. (CVE-2026-14663)
It was discovered that PostgreSQL had a heap buffer overflow in regular
expression processing. An authenticated user could possibly use this issue
to execute arbitrary code. (CVE-2026-14664)
It was discovered that PostgreSQL row security policies were not properly
invalidated when roles were modified. An attacker could possibly use this
issue to bypass intended row security restrictions. (CVE-2026-14666)
It was discovered that PostgreSQL had a type confusion issue in the
selectivity estimator involving ctid. An authenticated user could possibly
use this issue to obtain sensitive information. (CVE-2026-14668)
It was discovered that PostgreSQL had a heap buffer overflow in the to_char
function. An authenticated user could possibly use this issue to execute
arbitrary code. (CVE-2026-14669)
It was discovered that PostgreSQL had a heap buffer overflow in the PL/Perl
tied object handling. An authenticated user could possibly use this issue
to execute arbitrary code. (CVE-2026-14670)
It was discovered that PostgreSQL had a type confusion issue in the
referential integrity plan cache. An authenticated user could possibly use
this issue to execute arbitrary code. (CVE-2026-14671)
It was discovered that PostgreSQL had an observable response discrepancy
when non-default scram_iterations were used. A remote attacker could
possibly use this issue to enumerate valid usernames. This issue only
affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-14672)
It was discovered that PostgreSQL amcheck did not clear untrusted search
paths. An authenticated user could possibly use this issue to execute
arbitrary code. (CVE-2026-14673)
It was discovered that PostgreSQL had a heap buffer overflow in
pg_stat_statements. An authenticated user could possibly use this issue to
execute arbitrary code. This issue only affected Ubuntu 26.04 LTS.
(CVE-2026-14676)
It was discovered that PostgreSQL had integer wraparound issues in PL/Tcl
and PL/Perl allocations on 32-bit systems. An authenticated user could
possibly use this issue to execute arbitrary code. (CVE-2026-14677)
It was discovered that PostgreSQL pg_trgm read past the end of a buffer
during picksplit operations. An authenticated user could possibly use this
issue to obtain sensitive information. (CVE-2026-14678)
It was discovered that PostgreSQL had a stack buffer overflow in argument
matching. An authenticated user could possibly use this issue to corrupt
server memory. (CVE-2026-14679)
It was discovered that PostgreSQL had a type confusion issue when functions
used internal arguments. An authenticated user could possibly use this
issue to execute arbitrary code. (CVE-2026-14680)
It was discovered that PostgreSQL did not properly enforce GSSAPI
encryption when used together with SSL. An attacker could possibly use this
issue to perform a machine-in-the-middle attack and obtain sensitive
information. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-14681)
It was discovered that PostgreSQL allowed SQL injection through EXTRACT
arguments during expression deparsing. An authenticated user could possibly
use this issue to perform SQL injection attacks. (CVE-2026-15741)
It was discovered that PostgreSQL fuzzystrmatch had integer wraparound
issues that could write to arbitrary addresses. An authenticated user could
possibly use this issue to execute arbitrary code. (CVE-2026-15742)
It was discovered that PostgreSQL had a type confusion issue in
pg_restore_attribute_stats(). An authenticated user could possibly use this
issue to execute arbitrary code. This issue only affected Ubuntu 26.04 LTS.
(CVE-2026-16238)
It was discovered that PostgreSQL had a type confusion issue when handling
cursor CLOSE and DECLARE operations. An authenticated user could possibly
use this issue to execute arbitrary code. (CVE-2026-16239)
It was discovered that PostgreSQL had an integer underflow in the ECPG
client library. An attacker could possibly use this issue to cause
PostgreSQL to crash, resulting in a denial of service. (CVE-2026-16241)
It was discovered that PostgreSQL had an out-of-bounds read in the ascii()
function. An authenticated user could possibly use this issue to obtain
sensitive information. (CVE-2026-18024)
It was discovered that the psql unrestrict command allowed the superuser
of a pg_dump origin server to execute arbitrary code in the psql client. An
attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-18408)
It was discovered that PostgreSQL pg_dump had a heap buffer overflow. An
attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-19385)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
postgresql-18 18.6-0ubuntu0.26.04.1
Ubuntu 24.04 LTS
postgresql-16 16.15-0ubuntu0.24.04.1
Ubuntu 22.04 LTS
postgresql-14 14.24-0ubuntu0.22.04.1
This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8653-1
CVE-2025-8714, CVE-2026-14662, CVE-2026-14663, CVE-2026-14664,
CVE-2026-14666, CVE-2026-14668, CVE-2026-14669, CVE-2026-14670,
CVE-2026-14671, CVE-2026-14672, CVE-2026-14673, CVE-2026-14676,
CVE-2026-14677, CVE-2026-14678, CVE-2026-14679, CVE-2026-14680,
CVE-2026-14681, CVE-2026-15741, CVE-2026-15742, CVE-2026-16238,
CVE-2026-16239, CVE-2026-16241, CVE-2026-18024, CVE-2026-18408,
CVE-2026-19385, CVE-2026-6464, CVE-2026-6469, CVE-2026-6470,
CVE-2026-6471, CVE-2026-6473
Package Information:
https://launchpad.net/ubuntu/+source/postgresql-18/18.6-0ubuntu0.26.04.1
https://launchpad.net/ubuntu/+source/postgresql-16/16.15-0ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/postgresql-14/14.24-0ubuntu0.22.04.1
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