Описание
An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in Qt. When the function is called with a QByteArray that is not NUL-terminated (for example, one created with QByteArray::fromRawData()), the codec-name matching routine reads past the end of the supplied buffer. In most cases this results in an incorrect text codec being selected; in the worst case, if the over-read reaches unmapped memory, the process crashes (denial of service). The over-read is bounded by the length of the longest codec-name candidate, and the out-of-bounds bytes are only compared internally against Qt's fixed list of codec names, so no data is disclosed to an attacker. Applications that do not pass non-NUL-terminated QByteArrays to QTextCodec::codecForName() are not exposed. The affected code resides in the Qt5Compat module from Qt 6.0.0 onward, and in Qt Core (qtbase) in Qt 4.x and Qt 5.x.
A flaw was found in Qt, a popular software development framework. This vulnerability, an out-of-bounds read, occurs in the QTextCodec::codecForName() function when it processes specially crafted input that is not properly terminated. An attacker could exploit this to cause the application to select an incorrect text encoding, or in the worst case, trigger a crash, leading to a denial of service. This flaw does not result in the disclosure of sensitive information.
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 | qt | Out of support scope | ||
| Red Hat Enterprise Linux 6 | qt3 | Not affected | ||
| Red Hat Enterprise Linux 7 | qt | Affected | ||
| Red Hat Enterprise Linux 7 | qt3 | Not affected | ||
| Red Hat Hardened Images | qt5 | Affected | ||
| Red Hat Enterprise Linux 10 | qt6-qt5compat | Fixed | RHSA-2026:65816 | 09.09.2026 |
| Red Hat Enterprise Linux 8 | qt5-qtbase | Fixed | RHSA-2026:65897 | 09.09.2026 |
| Red Hat Enterprise Linux 9 | qt5-qtbase | Fixed | RHSA-2026:65993 | 09.09.2026 |
| Red Hat Hardened Images | qt6-main-6.11.1-2.hum1 | Fixed | RHSA-2026:41389 | 18.07.2026 |
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Дополнительная информация
Статус:
7.5 High
CVSS3
Связанные уязвимости
An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in Qt. When the function is called with a QByteArray that is not NUL-terminated (for example, one created with QByteArray::fromRawData()), the codec-name matching routine reads past the end of the supplied buffer. In most cases this results in an incorrect text codec being selected; in the worst case, if the over-read reaches unmapped memory, the process crashes (denial of service). The over-read is bounded by the length of the longest codec-name candidate, and the out-of-bounds bytes are only compared internally against Qt's fixed list of codec names, so no data is disclosed to an attacker. Applications that do not pass non-NUL-terminated QByteArrays to QTextCodec::codecForName() are not exposed. The affected code resides in the Qt5Compat module from Qt 6.0.0 onward, and in Qt Core (qtbase) in Qt 4.x and Qt 5.x.
An out-of-bounds read (buffer over-read) vulnerability exists in QTextCodec::codecForName() in Qt. When the function is called with a QByteArray that is not NUL-terminated (for example, one created with QByteArray::fromRawData()), the codec-name matching routine reads past the end of the supplied buffer. In most cases this results in an incorrect text codec being selected; in the worst case, if the over-read reaches unmapped memory, the process crashes (denial of service). The over-read is bounded by the length of the longest codec-name candidate, and the out-of-bounds bytes are only compared internally against Qt's fixed list of codec names, so no data is disclosed to an attacker. Applications that do not pass non-NUL-terminated QByteArrays to QTextCodec::codecForName() are not exposed. The affected code resides in the Qt5Compat module from Qt 6.0.0 onward, and in Qt Core (qtbase) in Qt 4.x and Qt 5.x.
An out-of-bounds read (buffer over-read) vulnerability exists in QText ...
7.5 High
CVSS3