Описание
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.
A flaw was found in PHP. Some functions, including urldecode(), incorrectly pass signed characters to character type (ctype) functions. On certain systems, this can lead to accessing memory with a negative offset. This vulnerability can be exploited by an attacker to trigger a denial of service (DoS), making the affected PHP application or system unavailable.
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 | php | Fix deferred | ||
| Red Hat Enterprise Linux 7 | php | Fix deferred | ||
| Red Hat Enterprise Linux 8 | php:7.4/php | Fix deferred | ||
| Red Hat Enterprise Linux 9 | php | Fix deferred | ||
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 | Fix deferred | ||
| Red Hat OpenShift Dev Spaces | devspaces/code-rhel9 | Fix deferred | ||
| Red Hat Enterprise Linux 10 | php8.4 | Fixed | RHSA-2026:22649 | 02.06.2026 |
| Red Hat Enterprise Linux 10 | php | Fixed | RHSA-2026:23388 | 04.06.2026 |
| Red Hat Enterprise Linux 8 | php | Fixed | RHSA-2026:22305 | 01.06.2026 |
| Red Hat Enterprise Linux 9 | php | Fixed | RHSA-2026:22142 | 01.06.2026 |
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Дополнительная информация
Статус:
EPSS
5.9 Medium
CVSS3
Связанные уязвимости
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before ...
EPSS
5.9 Medium
CVSS3