Описание
The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it's possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub's internal critical data and secure boot bypass is not discarded as consequence.
Отчет
Red Hat Product Security has rated this vulnerability with Moderate severity as it requires physical access and high privileges to exploit it. Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-190: Integer Overflow or Wraparound leads to CWE-787: Out-of-bounds Write vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low. Red Hat follows best practices and federal requirements for least privilege, allowing only specific processes to run under isolated, task-specific accounts with limited permissions tailored to team and federal platform roles. The environment employs file integrity checks and malicious code protections—including IPS/IDS and antimalware tools—to detect and prevent buffer overflow exploitation. Robust input validation and error handling ensure all user inputs are thoroughly validated, preventing instability, data exposure, or privilege escalation.
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 10 | grub2 | Affected | ||
| Red Hat Enterprise Linux 7 | grub2 | Out of support scope | ||
| Red Hat Enterprise Linux 8 | grub2 | Out of support scope | ||
| Red Hat OpenShift Container Platform 4 | rhcos | Fix deferred | ||
| Red Hat Enterprise Linux 9 | grub2 | Fixed | RHSA-2025:6990 | 13.05.2025 |
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Дополнительная информация
Статус:
EPSS
6.1 Medium
CVSS3
Связанные уязвимости
The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it's possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub's internal critical data and secure boot bypass is not discarded as consequence.
The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it's possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub's internal critical data and secure boot bypass is not discarded as consequence.
The read command is used to read the keyboard input from the user, whi ...
The read command is used to read the keyboard input from the user, while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process, with a line big enough it's possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub's internal critical data and secure boot bypass is not discarded as consequence.
Уязвимость загрузчика операционных систем Grub2, связанная с записью за пределами границ, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
6.1 Medium
CVSS3