qt6-qt5compat security update
. Security Fix(es): 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.(CVE-2026-9499)
OESA-2026-4099
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:OESA-2026-4099
qt6-qt5compat
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 6.5.2-2.oe2403sp3
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.5.2-2.oe2403sp3"
}
]
}
],
"package": {
"name": "qt6-qt5compat",
"purl": "pkg:rpm/openEuler/qt6-qt5compat&distro=openEuler-24.03-LTS-SP3",
"ecosystem": "openEuler:24.03-LTS-SP3"
},
"database_specific": {
"source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4099.json"
},
"ecosystem_specific": {
"src": [
"qt6-qt5compat-6.5.2-2.oe2403sp3.src.rpm"
],
"x86_64": [
"qt6-qt5compat-6.5.2-2.oe2403sp3.x86_64.rpm",
"qt6-qt5compat-debuginfo-6.5.2-2.oe2403sp3.x86_64.rpm",
"qt6-qt5compat-debugsource-6.5.2-2.oe2403sp3.x86_64.rpm",
"qt6-qt5compat-devel-6.5.2-2.oe2403sp3.x86_64.rpm"
],
"aarch64": [
"qt6-qt5compat-6.5.2-2.oe2403sp3.aarch64.rpm",
"qt6-qt5compat-debuginfo-6.5.2-2.oe2403sp3.aarch64.rpm",
"qt6-qt5compat-debugsource-6.5.2-2.oe2403sp3.aarch64.rpm",
"qt6-qt5compat-devel-6.5.2-2.oe2403sp3.aarch64.rpm"
]
}
}
]Publisher severity
medium
Source reference: /database_specific/severity
- Event
- #14744 · Revision 1
- Added to Heist Feed
- Publisher date