CVE-2023-51714
published 2023-12-24CVE-2023-51714: An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2…
PriorityP350critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.99%
58.0th percentile
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | qt6-base | < qt6-base 6.4.2+dfsg-21 (forky) | qt6-base 6.4.2+dfsg-21 (forky) |
| debian | qtbase-opensource-src | < qt6-base 6.4.2+dfsg-21 (forky) | qt6-base 6.4.2+dfsg-21 (forky) |
| debian | qtbase-opensource-src-gles | < qt6-base 6.4.2+dfsg-21 (forky) | qt6-base 6.4.2+dfsg-21 (forky) |
| msrc | azl3_qtbase_6.6.1-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_qtbase_6.6.2-1_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_qt5-qtbase_5.12.11-10_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_qt5-qtbase_5.12.11-15_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_qt5-qtsvg_5.12.11-6_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| qt | qt | >= 5.7 < 5.15.17 | 5.15.17 |
| qt | qt | >= 6.0.0 < 6.2.11 | 6.2.11 |
| qt | qt | >= 6.3.0 < 6.5.4 | 6.5.4 |
| qt | qt | >= 6.6.0 < 6.6.2 | 6.6.2 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_msrc9.8CRITICAL
vendor_redhat9.8CRITICAL
vendor_ubuntu7.5HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Ubuntu
Qt vulnerabilities
vendor_ubuntu·2026-03-05·CVSS 7.5
CVE-2020-13962 [HIGH] Qt vulnerabilities
Title: Qt vulnerabilities
Summary: Several security issues were fixed in Qt.
It was discovered that Qt did not correctly handle OpenSSL's error queue.
An attacker could possibly use this issue to cause a denial of service.
This issue was only addressed in Ubuntu 20.04 LTS. (CVE-2020-13962)
It was discovered that Qt incorrectly handled certain XBM image files. If a
user or automated system were tricked into opening a specially crafted PPM
file, a remote attacker could cause Qt to crash, resulting in a denial of
service. This issue was only addressed in Ubuntu 16.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-17507)
It was discovered that Qt did not correctly handle executing specific
binaries. If a user or automated system were tricked into executing a
binary at a specific file path, an attacke
Red Hat
qt: incorrect integer overflow check
vendor_redhat·2023-12-24·CVSS 9.8
CVE-2023-51714 [CRITICAL] CWE-190 qt: incorrect integer overflow check
qt: incorrect integer overflow check
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
An integer overflow vulnerability was found in Qt. An incorrect HPack integer overflow check can lead to denial of service.
Package: qt (Red Hat Enterprise Linux 6) - Out of support scope
Package: qt3 (Red Hat Enterprise Linux 6) - Out of support scope
Package: qt (Red Hat Enterprise Linux 7) - Out of support scope
Package: qt3 (Red Hat Enterprise Linux 7) - Out of support scope
Microsoft
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17 6.x before 6.2.11 6.3.x through 6.5.x before 6.5.4 and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect
vendor_msrc·2023-12-12·CVSS 9.8
CVE-2023-51714 [CRITICAL] CWE-190 An issue was discovered in the HTTP2 implementation in Qt before 5.15.17 6.x before 6.2.11 6.3.x through 6.5.x before 6.5.4 and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17 6.x before 6.2.11 6.3.x through 6.5.x before 6.5.4 and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is
Debian
CVE-2023-51714: qt6-base - An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x be...
vendor_debian·2023·CVSS 9.8
CVE-2023-51714 [CRITICAL] CVE-2023-51714: qt6-base - An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x be...
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
Scope: local
bookworm: open
forky: resolved (fixed in 6.4.2+dfsg-21)
sid: resolved (fixed in 6.4.2+dfsg-21)
trixie: resolved (fixed in 6.4.2+dfsg-21)
OSV
qtbase-opensource-src vulnerabilities
osv·2026-03-05·CVSS 7.5
CVE-2020-13962 [HIGH] qtbase-opensource-src vulnerabilities
qtbase-opensource-src vulnerabilities
It was discovered that Qt did not correctly handle OpenSSL's error queue.
An attacker could possibly use this issue to cause a denial of service.
This issue was only addressed in Ubuntu 20.04 LTS. (CVE-2020-13962)
It was discovered that Qt incorrectly handled certain XBM image files. If a
user or automated system were tricked into opening a specially crafted PPM
file, a remote attacker could cause Qt to crash, resulting in a denial of
service. This issue was only addressed in Ubuntu 16.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-17507)
It was discovered that Qt did not correctly handle executing specific
binaries. If a user or automated system were tricked into executing a
binary at a specific file path, an attacker could cause a denial of
service or exe
GHSA
GHSA-4fvr-x23f-jwc4: An issue was discovered in the HTTP2 implementation in Qt before 5
ghsa_unreviewed·2023-12-24
CVE-2023-51714 [CRITICAL] CWE-190 GHSA-4fvr-x23f-jwc4: An issue was discovered in the HTTP2 implementation in Qt before 5
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
OSV
CVE-2023-51714: An issue was discovered in the HTTP2 implementation in Qt before 5
osv·2023-12-24·CVSS 9.8
CVE-2023-51714 [CRITICAL] CVE-2023-51714: An issue was discovered in the HTTP2 implementation in Qt before 5
An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://codereview.qt-project.org/c/qt/qtbase/+/524864https://codereview.qt-project.org/c/qt/qtbase/+/524865/3https://lists.debian.org/debian-lts-announce/2024/04/msg00027.htmlhttps://codereview.qt-project.org/c/qt/qtbase/+/524864https://codereview.qt-project.org/c/qt/qtbase/+/524865/3https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
2023-12-24
Published