The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:44420 advisory.

    The libpq package provides the PostgreSQL client library, which allows client programs to connect to     PostgreSQL servers.

    Security Fix(es):

    * postgresql: PostgreSQL: Operating system account hijack via symlink following in pg_basebackup and     pg_rewind (CVE-2026-6475)

    * postgresql: PostgreSQL libpq: Buffer overflow allows server superuser to overwrite client stack memory     (CVE-2026-6477)

    * postgresql: PostgreSQL: Credential recovery via covert timing channel in MD5 password comparison     (CVE-2026-6478)

    * postgresql: integer overflow can cause an undersized allocation and an out-of-bounds write     (CVE-2026-6473)

    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 these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1943-1 advisory.

    This update for postgresql17 fixes the following issues

    Update to version 17.10.

    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-2026-6476: Properly quote subscription names in pg_createsubscriber (bsc#1265176).
    - 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).
    - CVE-2026-6638: Properly quote object names in logical replication origin checks (bsc#1265182).

    Non security issue:

    - Get rid of update-alternatives for openSUSE/SLE 16.0 and newer to support immutable systems and     transactional       updates (jsc#PED-14825 bsc#1245875).
    - /usr/bin/pg_config is missing after migrating away from update-alternatives (bsc#1263804).

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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1767 advisory.

    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.  Versions before PostgreSQL 18.4, 17.10,     16.14, 15.18, and 14.23 are affected. (CVE-2026-6472)

    Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause     the server to undersize an allocation and write out-of-bounds.  This may execute arbitrary code as the     operating system user running the database.  In applications that pass gigabyte-scale user inputs to the     relevant database functions, the application input provider may achieve a segmentation fault.  Versions     before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6473)

    Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve     portions of server memory, via crafted timezone zones.  Versions before PostgreSQL 18.4, 17.10, 16.14,     15.18, and 14.23 are affected. (CVE-2026-6474)

    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.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
    (CVE-2026-6475)

    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.
    Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6477)

    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.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and     14.23 are affected. (CVE-2026-6478)

    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)

    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.  Versions before     PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6637)

    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.  Within major versions 16, 17, and 18, minor     versions before PostgreSQL 18.4, 17.10, and 16.14 are affected.  Versions before PostgreSQL 16 are     unaffected. (CVE-2026-6638)

Tenable has extracted the preceding description block directly from the tested product 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 postgresql installed on the remote host is prior to 14.23-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2POSTGRESQL14-2026-024 advisory.

    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.  Versions before PostgreSQL 18.4, 17.10,     16.14, 15.18, and 14.23 are affected. (CVE-2026-6472)

    Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause     the server to undersize an allocation and write out-of-bounds.  This may execute arbitrary code as the     operating system user running the database.  In applications that pass gigabyte-scale user inputs to the     relevant database functions, the application input provider may achieve a segmentation fault.  Versions     before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6473)

    Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve     portions of server memory, via crafted timezone zones.  Versions before PostgreSQL 18.4, 17.10, 16.14,     15.18, and 14.23 are affected. (CVE-2026-6474)

    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.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
    (CVE-2026-6475)

    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.
    Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6477)

    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.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and     14.23 are affected. (CVE-2026-6478)

    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)

    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.  Versions before     PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. (CVE-2026-6637)

Tenable has extracted the preceding description block directly from the tested product 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	名称	产品	系列	发布时间	最近更新时间	严重程度
329235	RHEL 8 : libpq (RHSA-2026:44420)	Nessus	Red Hat Local Security Checks	2026/7/23	2026/7/23	high
315289	SUSE SLED15 / SLES15 Security Update : postgresql17 (SUSE-SU-2026:1943-1)	Nessus	SuSE Local Security Checks	2026/5/19	2026/5/22	high
319766	Amazon Linux 2023 : postgresql16, postgresql16-contrib, postgresql16-llvmjit (ALAS2023-2026-1767)	Nessus	Amazon Linux Local Security Checks	2026/6/8	2026/6/8	high
319872	Amazon Linux 2 : postgresql, --advisory ALAS2POSTGRESQL14-2026-024 (ALASPOSTGRESQL14-2026-024)	Nessus	Amazon Linux Local Security Checks	2026/6/8	2026/6/8	high

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