Описание
Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
A flaw was found in PostgreSQL. An unprivileged database user can exploit an integer wraparound vulnerability in the tsvector and tsquery data type functions. By providing crafted large inputs, the server can be forced to undersize an allocation, leading to an out-of-bounds write. This could potentially allow an attacker to execute arbitrary code as the operating system user running the database.
Отчет
This is an Important vulnerability in PostgreSQL where an unprivileged database user could achieve arbitrary code execution due to an integer wraparound in tsvector and tsquery functions. While direct exploitation by application users is considered unlikely as these functions are typically used by application logic, the flaw could still be leveraged in specific scenarios where crafted large inputs are processed.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | postgresql | Out of support scope | ||
| Red Hat Hardened Images | postgresql17 | Not affected | ||
| Red Hat Hardened Images | postgresql18 | Not affected | ||
| Red Hat Enterprise Linux 10 | postgresql18 | Fixed | RHSA-2026:67280 | 14.09.2026 |
| Red Hat Enterprise Linux 10 | postgresql16 | Fixed | RHSA-2026:70186 | 22.09.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | postgresql16 | Fixed | RHSA-2026:72282 | 28.09.2026 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | postgresql | Fixed | RHSA-2026:84585 | 19.10.2026 |
| Red Hat Enterprise Linux 8 | postgresql | Fixed | RHSA-2026:69876 | 22.09.2026 |
| Red Hat Enterprise Linux 8 | postgresql | Fixed | RHSA-2026:69923 | 22.09.2026 |
| Red Hat Enterprise Linux 8 | postgresql | Fixed | RHSA-2026:69924 | 23.09.2026 |
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Дополнительная информация
Статус:
EPSS
8.8 High
CVSS3
Связанные уязвимости
Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
PostgreSQL tsvector and tsquery undersize allocations, via integer wraparound
Integer wraparound in PostgreSQL tsvector and tsquery data type functi ...
Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
EPSS
8.8 High
CVSS3