CVE catalog

CVE-2025-5991

qt6-base: CVE-2025-5991

Severity: Medium · CVSS 5.6CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Published: Jun 11, 2025, 7:33:41 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.14% · Oct 25, 2026

There is a "Use After Free" vulnerability in Qt's QHttp2ProtocolHandler in the QtNetwork module. This only affects HTTP/2 handling, HTTP handling is not affected by this at all. This happens due to a race condition between how QHttp2Stream uploads the body of a POST request and the simultaneous handling of HTTP error responses. This issue only affects Qt 6.9.0 and has been fixed for Qt 6.9.1.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	qt6-base	sid	`6.11.2+dfsg-7`	not affected
Debian	qt6-base	forky	`6.11.2+dfsg-5`	not affected
Debian	qt6-base	trixie	`6.8.2+dfsg-9+deb13u2`	not affected
Debian	qt6-base	bookworm	`6.4.2+dfsg-10`	not affected
Debian	qtbase-opensource-src	sid	`5.15.19+dfsg-6`	not affected
Debian	qtbase-opensource-src	forky	`5.15.19+dfsg-5`	not affected
Debian	qtbase-opensource-src	trixie	`5.15.15+dfsg-6+deb13u1`	not affected
Debian	qtbase-opensource-src	bookworm	`5.15.8+dfsg-11+deb12u3`	not affected
Debian	qtbase-opensource-src-gles	sid	`5.15.19+dfsg-2`	not affected
Debian	qtbase-opensource-src-gles	forky	`5.15.19+dfsg-2`	not affected
Debian	qtbase-opensource-src-gles	trixie	`5.15.15+dfsg-2`	not affected
Debian	qtbase-opensource-src-gles	bookworm	`5.15.8+dfsg-3`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	qt6-base	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	qt6-base	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	qt6-base	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	qt6-base	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src-gles	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src-gles	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src-gles	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	qtbase-opensource-src-gles	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libqt5concurrent5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5core5a]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5dbus5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5gui5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5gui5-gles]Not affected
Source package: [qtbase-opensource-src-gles]
Details (2)
- 5.15.8+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src-gles · debian · bookworm
- 5.15.8+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src-gles · debian · bookworm
[libqt5network5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5opengl5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5opengl5-dev]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5printsupport5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-ibase]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-mysql]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-odbc]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-psql]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-sqlite]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5sql5-tds]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5test5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5widgets5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt5xml5]Not affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Not affected
  dsa · qtbase-opensource-src · debian · bookworm
[libqt6concurrent6]Not affected
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm
- 6.4.2+dfsg-10 · arm64 · bookworm
  Not affected
  dsa · qt6-base · debian · bookworm

Next results

Observed: Oct 24, 2026, 9:52:47 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]