CVE-2026-116308
Description
A flaw was found in PostgreSQL. An authenticated database user can trigger a buffer over-read in the dict_int extension by supplying a zero-length token. This vulnerability can lead to information disclosure by exposing portions of server memory.
Statement
This vulnerability is rated as Moderate because exploitation requires an authenticated database connection and the non-default dict_int extension to be installed in the target database. Under standard Red Hat enterprise deployments, this dictionary extension is not enabled by default, significantly limiting the exposure of typical installations. When the extension is present, an authenticated attacker can read adjacent server memory contents, but cannot modify database records or achieve arbitrary code execution.
Mitigation
Remove the optional dict_int extension from databases where it is not strictly required, or restrict database access to prevent untrusted users from querying dictionaries that rely on this module.
To remove the extension from a specific database, execute the following SQL command as a superuser or database owner:
DROP EXTENSION IF EXISTS dict_int CASCADE;
Caveats: Dropping this extension removes any dependent full-text search configurations and will cause queries relying on dict_int to fail. Verify whether application schemas utilize this dictionary template prior to removal.
Service impact: Executing this command takes effect immediately within the database; restarting or reloading the PostgreSQL service is not required.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
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)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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