An update of the postgresql16 package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a     PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an     attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10,     16.14, 15.18, and 14.23 are affected. (CVE-2026-6479)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1612:08 advisory.

    * postgresql: PostgreSQL: Denial of Service via uncontrolled recursion in SSL/GSS negotiation     (CVE-2026-6479)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-52395 advisory.

    - Apply patch for CVE-2026-6479 in prep section
    - Resolves: CVE-2026-6479
    - Backport fix for CVE-2026-6479 from PostgreSQL 14.23       (SSL/GSS init causes denial of service via uncontrolled recursion)

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:57633 advisory.

    PostgreSQL is an advanced object-relational database management system (DBMS).

    Security Fix(es):

    * postgresql: PostgreSQL: Denial of Service via uncontrolled recursion in SSL/GSS negotiation     (CVE-2026-6479)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22183-1 advisory.

    This update for postgresql15 fixes the following issues

    Security issues:

    - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified (bsc#1265172).
    - CVE-2026-6473: integer overflows in memory-allocation calculations (bsc#1265173).
    - CVE-2026-6474: Guard against malicious time zone names (bsc#1265174).
    - CVE-2026-6475: Prevent path traversal in pg_basebackup and pg_rewind (bsc#1265175).
    - CVE-2026-6477: Mark PQfn() as unsafe, and avoid using it within libpq (bsc#1265177).
    - CVE-2026-6478: Use timing-safe string comparisons in authentication code (bsc#1265178).
    - CVE-2026-6479: Prevent unbounded recursion while processing startup packets (bsc#1265179).
    - CVE-2026-6637: Prevent SQL injection and buffer overruns in contrib/spi (bsc#1265181).

    Non security issue:

    - Update to version 15.18.
    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer      to support immutable systems and transactional updates (jsc#PED-14823).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f8ee1fd482 advisory.

    Automatic update for postgresql16-16.14-1.fc44.

    ##### **Changelog for postgresql16**

    ```
    * Thu May 14 2026 Packit <hello@packit.dev> - 16.14-1
    - Update to version 16.14
    - Resolves: rhbz#2477451

    ```


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 7185ecc9-4fb7-11f1-bc50-6cc21735f730 advisory.

    The PostgreSQL project reports:

              Missing authorization in PostgreSQL CREATE TYPE               allows an object creator to hijack other queries that use               search_path to find user-defined types, including               extension-defined types. That is to say, the victim will execute               arbitrary SQL functions of the attacker's choice.


              Integer wraparound in multiple PostgreSQL server               features allows an application input provider to cause the               server to undersize an allocation and write out-of-bounds. This               results in a segmentation fault.


              Externally-controlled format string in PostgreSQL timeofday()               function allows an attacker to retrieve portions of server               memory, via crafted timezone zones.


              Symlink following in               PostgreSQL pg_basebackup plain format and in pg_rewind allows an               origin superuser to overwrite local files, e.g.
              /var/lib/postgres/.bashrc, that hijack the operating system               account. It will remain the case that starting the server after               these commands implicitly trusts the origin superuser, due to               features like shared_preload_libraries. Hence, the attack has               practical implications only if one takes relevant action between               these commands and server start, like moving the files to a               different VM or snapshotting the VM.


              SQL injection in PostgreSQL               pg_createsubscriber allows an attacker with               pg_create_subscription rights to execute arbitrary SQL as a               superuser. The attack takes effect when pg_createsubscriber next               runs. Versions before PostgreSQL 17 are unaffected.


              PostgreSQL libpq lo_* functions let server superuser overwrite               client stack memory. Use of inherently dangerous function               PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(),               lo_read(), lo_lseek64(), and lo_tell64() functions allows the               server superuser to overwrite a client stack buffer with an               arbitrarily-large response. Like gets(), PQfn(...,               result_is_int=0, ...) stores arbitrary-length, server-determined               data into a buffer of unspecified size. Because both the               \lo_export command in psql and pg_dump call lo_read(), the               server superuser can overwrite pg_dump or psql stack memory.


              PostgreSQL discloses MD5-hashed passwords via covert timing               channel. Covert timing channel in comparison of MD5-hashed               password in PostgreSQL authentication allows an attacker to               recover user credentials sufficient to authenticate. This does               not affect scram-sha-256 passwords, the default in all supported               releases. However, current databases may have MD5-hashed               passwords originating in upgrades from PostgreSQL 13 or earlier.


              PostgreSQL SSL/GSS init causes denial of service, via               uncontrolled recursion. Uncontrolled recursion in PostgreSQL SSL               and GSS negotiation allows an attacker able to connect to a               PostgreSQL AF_UNIX socket to achieve sustained denial of               service. If SSL and GSS are both disabled, an attacker can do               the same via access to a PostgreSQL TCP socket.


              PostgreSQL pg_restore_attribute_stats accepts values that cause               query planning to read past end of stats array. Buffer over-read               in PostgreSQL function pg_restore_attribute_stats() accepts               array values of unmatched length, which causes query planning to               read past end of one array. This allows a table maintainer to               infer memory values past that array end. Versions before               PostgreSQL 18 are unaffected.


              PostgreSQL refint allows stack buffer overflow and SQL               injection. Stack buffer overflow in PostgreSQL module refint               allows an unprivileged database user to execute arbitrary code               as the operating system user running the database. A distinct               attack is possible if the application declares a user-controlled               column as a refint cascade primary key and facilitates               user-controlled updates to that column. In that case, a SQL               injection allows a primary key update value provider to execute               arbitrary SQL as the database user performing the primary key               update.


              PostgreSQL REFRESH PUBLICATION allows SQL injection via table               name. SQL injection in PostgreSQL logical replication ALTER               SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table               creator to execute arbitrary SQL with the subscription's               publication-side credentials. The attack takes effect at the               next REFRESH PUBLICATION. Versions before PostgreSQL 16 are               unaffected.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8294-1 advisory.

    It was discovered that PostgreSQL did not correctly enforce authorization for CREATE TYPE. An attacker     could possibly use this issue to execute arbitrary SQL functions. (CVE-2026-6472)

    It was discovered that PostgreSQL incorrectly handled large user input in multiple server features. An     attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or     execute arbitrary code. (CVE-2026-6473)

    It was discovered that PostgreSQL incorrectly handled format strings in the timeofday() function. An     attacker could possibly use this issue to obtain sensitive information. (CVE-2026-6474)

    It was discovered that PostgreSQL incorrectly followed symbolic links in pg_basebackup and pg_rewind. An     attacker could possibly use this issue to overwrite local files and execute arbitrary code.
    (CVE-2026-6475)

    It was discovered that PostgreSQL had an SQL injection vulnerability in pg_createsubscriber. An attacker     could possibly use this issue to execute arbitrary SQL as a superuser. This issue only affected Ubuntu     25.10 and Ubuntu 26.04 LTS. (CVE-2026-6476)

    It was discovered that PostgreSQL used an unsafe libpq function in large object operations. An attacker     could possibly use this issue to overwrite client memory and execute arbitrary code. (CVE-2026-6477)

    It was discovered that PostgreSQL did not compare MD5-hashed passwords in constant time. An attacker could     possibly use this issue to obtain sensitive information. (CVE-2026-6478)

    It was discovered that PostgreSQL had uncontrolled recursion during SSL and GSS negotiation. An attacker     could possibly use this issue to cause a denial of service. (CVE-2026-6479)

    It was discovered that PostgreSQL incorrectly handled array length mismatches in     pg_restore_attribute_stats(). An attacker could possibly use this issue to obtain sensitive information.
    This issue only affected Ubuntu 26.04 LTS. (CVE-2026-6575)

    It was discovered that PostgreSQL had a stack buffer overflow in the refint module. An attacker could use     this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly execute arbitrary     code. (CVE-2026-6637)

    It was discovered that PostgreSQL had an SQL injection vulnerability in logical replication REFRESH     PUBLICATION. An attacker could possibly use this issue to execute arbitrary SQL. This issue only affected     Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-6638)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
337082	Photon OS 5.0: Postgresql16 PHSA-2026-5.0-92-0959	Nessus	PhotonOS Local Security Checks	8/18/2026	8/18/2026	high
314719	Linux Distros Unpatched Vulnerability : CVE-2026-6479	Nessus	Misc.	5/14/2026	8/18/2026	high
338854	MiracleLinux 9 : postgresql-13.23-5.el9_8 (AXSA:2026-1612:08)	Nessus	Miracle Linux Local Security Checks	8/22/2026	8/22/2026	high
334553	Oracle Linux 9 : postgresql (ELSA-2026-52395)	Nessus	Oracle Linux Local Security Checks	8/11/2026	8/11/2026	high
338424	RHEL 9 : postgresql (RHSA-2026:57633)	Nessus	Red Hat Local Security Checks	8/20/2026	8/20/2026	high
323071	SUSE SLES16: postgresql15 / postgresql15-contrib / postgresql15-devel / etc (SUSE-SU-2026:22183-1)	Nessus	SuSE Local Security Checks	6/26/2026	6/26/2026	high
331521	Fedora 44 : postgresql16 (2026-f8ee1fd482)	Nessus	Fedora Local Security Checks	7/31/2026	7/31/2026	high
314914	FreeBSD : PostgreSQL -- Multiple vulnerabilities (7185ecc9-4fb7-11f1-bc50-6cc21735f730)	Nessus	FreeBSD Local Security Checks	5/15/2026	5/22/2026	high
316495	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : PostgreSQL vulnerabilities (USN-8294-1)	Nessus	Ubuntu Local Security Checks	5/22/2026	5/22/2026	high

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