Threats Tagged 'cve-2026-15742'

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Multiple arbitrary code execution vulnerabilities have been identified in PostgreSQL, affecting various functions and plugins including tsvector, tsquery, logical decoding plugin, regexp, pltcl, plperl, fuzzystrmatch, cursor lifecycle, POSIX timezone abbreviation, and pg_dump transform lists. These vulnerabilities are addressed in a security update released by Red Hat for PostgreSQL 15 and related versions. The update is rated as important by Red Hat Product Security and fixes several critical issues that could allow attackers to execute arbitrary code.

This security update for PostgreSQL 18 addresses multiple vulnerabilities affecting various components such as psql, logical decoding, pgcrypto, regexp, and others. The issues include heap buffer overflows that can lead to arbitrary code execution, type confusion, integer wraparound causing undersize allocations, privilege enforcement failures, and SQL injection risks. The update fixes these vulnerabilities to improve the security and stability of PostgreSQL 18 and related versions.

An integer wraparound vulnerability in PostgreSQL's fuzzystrmatch module allows attackers to write to arbitrary memory addresses. This occurs via specially crafted inputs to the levenshtein() or levenshtein_less_equal() SQL functions. Successful exploitation can lead to arbitrary code execution with the privileges of the database operating system user. Versions prior to PostgreSQL 14.24, 15.19, 16.15, 17.11, and 18.6 are affected. A patch is available to address this issue.

CVE-2026-15742 is an integer overflow or wraparound vulnerability in PostgreSQL's fuzzystrmatch extension. It allows a user with database privileges to execute arbitrary code as the operating system user running the database by providing extreme inputs to the levenshtein() or levenshtein_less_equal() SQL functions. This affects multiple PostgreSQL versions prior to 18.6, 17.11, 16.15, 15.19, and 14.24.