CVE-2026-6575
Description
A flaw was found in PostgreSQL. This buffer over-read vulnerability in the pg_restore_attribute_stats() function allows a table maintainer to infer memory values. By providing array values of unmatched length, a malicious table maintainer can cause query planning to read past the end of an array, leading to information disclosure.
Mitigation
To mitigate this information disclosure vulnerability, restrict network access to the PostgreSQL server to only trusted clients. Configure firewall rules to limit inbound connections to the PostgreSQL port (default 5432) from authorized hosts only. For example, using `firewall-cmd` on Red Hat Enterprise Linux:
`sudo firewall-cmd --permanent --add-source=<TRUSTED_IP_ADDRESS>/32 --zone=public`
`sudo firewall-cmd --permanent --add-port=5432/tcp --zone=public`
`sudo firewall-cmd --reload`
Alternatively, configure PostgreSQL to listen only on the localhost interface by setting `listen_addresses = 'localhost'` in `postgresql.conf` and restarting the PostgreSQL service.
`sudo systemctl restart postgresql`
This reduces the attack surface by preventing unauthorized network access to the database. Note that restarting the PostgreSQL service will temporarily interrupt database operations.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.3 | N/A | 4.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of a program's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the program into an infinite loop.
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