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[SECURITY] [DLA 4387-1] qtbase-opensource-src security update



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Debian LTS Advisory DLA-4387-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Sylvain Beucler
November 29, 2025                             https://wiki.debian.org/LTS
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Package        : qtbase-opensource-src
Version        : 5.15.2+dfsg-9+deb11u2
CVE ID         : CVE-2024-39936
Debian Bug     : 1076293

A race condition was discovered in Qt, a cross-platform C++
application framework. Code to make security-relevant decisions about
an established HTTP2 connection may execute too early, because the
encrypted() signal has not yet been emitted and processed.

For Debian 11 bullseye, this problem has been fixed in version
5.15.2+dfsg-9+deb11u2.

We recommend that you upgrade your qtbase-opensource-src packages.

For the detailed security status of qtbase-opensource-src please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/qtbase-opensource-src

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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