IBM SECURITY ADVISORY First Issued: Thu Apr 2 15:29:58 CDT 2026 The most recent version of this document is available here: https://aix.software.ibm.com/aix/efixes/security/postgres_advisory.asc Security Bulletin: Multiple vulnerabilities in PostgreSQL affect PowerVM VIOS =============================================================================== SUMMARY: Vulnerabilities in PostgreSQL could allow an attacker to cause a denial of service (CVE-2025-4207), read sensitive data (CVE-2025-8713), or inject arbitrary code (CVE-2025-8714, CVE-2025-8715). PowerVM VIOS uses PostgreSQL as part of Shared Storage Pools (SSP) and for internal administration purposes. =============================================================================== VULNERABILITY DETAILS: CVEID: CVE-2025-4207 https://www.cve.org/CVERecord?id=CVE-2025-4207 DESCRIPTION: Buffer over-read in PostgreSQL GB18030 encoding validation allows a database input provider to achieve temporary denial of service on platforms where a 1-byte over-read can elicit process termination. This affects the database server and also libpq. CVSS Base Score: 5.9 CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) CVEID: CVE-2025-8713 https://www.cve.org/CVERecord?id=CVE-2025-8713 DESCRIPTION: PostgreSQL optimizer statistics allow a user to read sampled data within a view that the user cannot access. Separately, statistics allow a user to read sampled data that a row security policy intended to hide. PostgreSQL maintains statistics for tables by sampling data available in columns; this data is consulted during the query planning process. Prior to this release, a user could craft a leaky operator that bypassed view access control lists (ACLs) and bypassed row security policies in partitioning or table inheritance hierarchies. Reachable statistics data notably included histograms and most-common-values lists. CVSS Base Score: 3.1 CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N) CVEID: CVE-2025-8714 https://www.cve.org/CVERecord?id=CVE-2025-8714 DESCRIPTION: Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql meta-commands. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-format dump. CVSS Base Score: 8.8 CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVEID: CVE-2025-8715 https://www.cve.org/CVERecord?id=CVE-2025-8715 DESCRIPTION: Improper neutralization of newlines in pg_dump in PostgreSQL allows a user of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql meta-commands inside a purpose-crafted object name. The same attacks can achieve SQL injection as a superuser of the restore target server. pg_dumpall, pg_restore, and pg_upgrade are also affected. CVSS Base Score: 8.8 CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) AFFECTED PRODUCTS AND VERSIONS: VIOS 4.1 The vulnerability is being addressed in the following fileset levels: key_fileset = aix Fileset Lower Level Upper Level KEY --------------------------------------------------------- ios.database.rte 7.3.3.0 7.3.3.1 key_w_fs ios.viodb13.rte 7.3.4.0 7.3.4.0 key_w_fs ios.viodb15.rte 7.3.4.0 7.3.4.0 key_w_fs Note: Postgres 13 is out of support. Considering long term support, it is advised to upgrade to Postgres 15. To find out whether the affected filesets are installed on your systems, refer to the lssw command found in VIOS user's guide. Example: lssw | grep -i ios REMEDIATION: FIXES IBM strongly recommends addressing the vulnerability now. The VIOS fixes can be downloaded via https from: https://aix.software.ibm.com/aix/efixes/security/postgres_fix.tar The link above is to a tar file containing this signed advisory, install packages, and OpenSSL signatures for each package. The fixes below include prerequisite checking. This will enforce the correct mapping between the fixes and VIOS levels. NOTE: To help with enabling the fix, a README file is provided in the tar file. To extract the fixes from the tar file: tar xvf postgres_fix.tar For postgres 13: tar xvf postgres_fix/viodb13.tar For postgres 15: tar xvf postgres_fix/viodb15.tar IMPORTANT: If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding. To preview the fix installation: oem_setup_env installp -apYd . ios To install the fix package: oem_setup_env installp -aXYd . ios Verify you have retrieved the fixes intact: The checksums below were generated using the "openssl dgst -sha256 [file]" command as the following: openssl dgst -sha256 filename KEY ---------------------------------------------------------------------------------------- 36045d6d82f60dc68f399211a92dad6bf63992e5344486eeeb61be88b6bac1cd ios.viodb13 key_w_csum b2d3bc3f9890dad10ed7a088886fb4d593852a9521401209ae8947f15f0c772c ios.viodb15 key_w_csum openssl dgst -sha512 filename ------------------------------------------------------------------------------------------------------------------------------------------------------------------ 2323734983ff7a851e8c8859ac3a0800478f14de82045d6d43b1f9d04eec151c0fa8769b332d270b5b5258951924fa0689da04cd00a97c7b44f7779800d23a8c ios.viodb13 key_4K_w_csum 6304969f57c086fac8b50ac18d03ddd870cdf80f09792ed518ae2d6094d735f9a4a3b667f6701f9670863eae07b54d0256324f9452085d1e1ccea915b38df724 ios.viodb15 key_4K_w_csum These sums should match exactly. The OpenSSL signatures in the tar file and on this advisory can also be used to verify the integrity of the fixes. If the sums or signatures cannot be confirmed, contact IBM Support at http://ibm.com/support/ and describe the discrepancy. openssl dgst -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file] openssl dgst -sha256 -verify [pubkey_file] -signature [ifix_file].sig [ifix_file] Published advisory OpenSSL signature file location: https://aix.software.ibm.com/aix/efixes/security/postgres_advisory.asc.sig WORKAROUNDS AND MITIGATIONS: None. =============================================================================== CONTACT US: Note: Keywords labeled as KEY in this document are used for parsing purposes. If you would like to receive AIX Security Advisories via email, please visit "My Notifications": http://www.ibm.com/support/mynotifications Contact IBM Support for questions related to this announcement: https://ibm.com/support/ For information on how to securely verify AIX security bulletins and fixes: https://www.ibm.com/support/pages/node/6985269 To obtain the OpenSSL public key that can be used to verify the signed advisories and ifixes: Download the key from our web page: https://aix.software.ibm.com/aix/efixes/security/systems_p_os_aix_security_pubkey.txt To verify the AIX/VIOS security bulletin: Published advisory OpenSSL signature file location: https://aix.software.ibm.com/aix/efixes/security/postgres_advisory.asc.sig openssl dgst -sha256 -verify [pubkey_file] -signature [advisory_file].sig [advisory_file] Please contact your local IBM AIX support center for any assistance. REFERENCES: Complete CVSS v3 Guide: http://www.first.org/cvss/user-guide On-line Calculator v3: http://www.first.org/cvss/calculator/3.0 RELATED INFORMATION: IBM Secure Engineering Web Portal http://www.ibm.com/security/secure-engineering/bulletins.html IBM Product Security Incident Response Blog https://www.ibm.com/blogs/psirt/ Security Bulletin: Multiple vulnerabilities in PostgreSQL affect PowerVM VIOS https://www.ibm.com/support/pages/node/7268496 ACKNOWLEDGEMENTS: None. CHANGE HISTORY: First Issued: Thu Apr 2 15:29:58 CDT 2026 =============================================================================== *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin. Disclaimer According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.