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Fencer Vulns
critical 9.8

CVE-2023-51714 json

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 be…

published 2023-12-24 2 y ago modified 2026-10-08 31 d ago also EUVD-2023-56411

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

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.

Patch / fix

  • qt qt 5.15.17, 6.2.11, 6.5.4, 6.6.2
  • qt6-base Debian 14, Debian 13 6.4.2+dfsg-21
  • qtbase-opensource-src Debian 12 5.15.8+dfsg-11+deb12u2
  • qtbase-opensource-src Debian 14, Debian 13 5.15.10+dfsg-6
  • qtbase-opensource-src-gles Debian 14, Debian 13 5.15.10+dfsg-4

debian advisories DEBIAN-CVE-2023-51714

  • qtbase-opensource-src Ubuntu Pro 18.04 LTS 5.9.5+dfsg-0ubuntu2.6+esm2
  • qtbase-opensource-src Ubuntu Pro 20.04 LTS 5.12.8+dfsg-0ubuntu2.1+esm3
  • qtbase-opensource-src Ubuntu Pro 22.04 LTS 5.15.3+dfsg-2ubuntu0.2+esm3

ubuntu advisories UBUNTU-CVE-2023-51714

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qt5-qtbase RHEL 8 5.15.3-7.el8
  • qt5-qtbase-gui RHEL 8 5.15.3-7.el8
  • qt5-qtbase-odbc RHEL 8 5.15.3-7.el8
  • qt5-qtbase-mysql RHEL 8 5.15.3-7.el8
  • qt5-qtbase-common RHEL 8 5.15.3-7.el8
  • qt5-qtbase-examples RHEL 8 5.15.3-7.el8
  • qt5-qtbase-postgresql RHEL 8 5.15.3-7.el8
  • qt5-qtbase RHEL 9 5.15.9-9.el9

red hat advisories RHSA-2024:3056RHSA-2024:2276

  • libqt5-qtbase SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +4 more 5.12.7-150200.4.29.1
  • libqt5-qtbase SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +3 more 5.15.2+kde294-150400.6.15.1
  • libqt5-qtbase SLE Module for Desktop Applications 15 SP5, SLE Module for Basesystem 15 SP5, openSUSE Leap 15.5 5.15.8+kde185-150500.4.16.1
  • qt6-base SLE Module for Package Hub 15 SP5, SLE Module for Desktop Applications 15 SP5, openSUSE Leap 15.5 6.4.2-150500.3.14.1

suse advisories SUSE-SU-2024:2946-1SUSE-SU-2024:2890-1SUSE-SU-2024:0138-1SUSE-SU-2024:0063-1

  • libqt5-qtbase openSUSE Tumbleweed 5.15.12+kde147-1.1
  • qt6-base openSUSE Tumbleweed 6.6.1-5.1

opensuse advisories openSUSE-SU-2024:13553-1openSUSE-SU-2024:13555-1

  • qt5-qtbase AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-gui AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-odbc AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-mysql AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-common AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-examples AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase-postgresql AlmaLinux 8 5.15.3-7.el8
  • qt5-qtbase AlmaLinux 9 5.15.9-9.el9

almalinux advisories ALSA-2024:3056ALSA-2024:2276

  • qt5-qtbase Rocky Linux 8 5.15.3-7.el8

rocky linux advisories RLSA-2024:3056

  • qt5-qtbase CBL-Mariner 2.0 5.12.11-10
  • qtbase Azure Linux 3.0 6.6.2-1

azure linux advisories AZL-33517AZL-38245

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-51714 updated cvss 7.5

qt: incorrect integer overflow check

  • Red Hat Enterprise Linux 6 qt, qt3, qt-x11, qt-odbc, qt-demos, qt-mysql, +10 more Red Hat Enterprise Linux 7 qt, qt3, qt-x11, qt-odbc, qt-qvfb, qt-demos, +12 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase 5.15.3-7.el8, qt5-qtbase-gui 5.15.3-7.el8, qt5-qtbase-odbc 5.15.3-7.el8, qt5-qtbase-mysql 5.15.3-7.el8, qt5-qtbase-common 5.15.3-7.el8, qt5-qtbase-examples 5.15.3-7.el8, +1 more
    fixed: vendor fix RHSA-2024:3056
  • Red Hat Enterprise Linux AppStream (v. 9) qt5-qtbase 5.15.9-9.el9, qt5-qtbase-gui 5.15.9-9.el9, qt5-qtbase-odbc 5.15.9-9.el9, qt5-qtbase-mysql 5.15.9-9.el9, qt5-qtbase-common 5.15.9-9.el9, qt5-qtbase-examples 5.15.9-9.el9, +1 more
    fixed: vendor fix RHSA-2024:2276
  • Red Hat Enterprise Linux CRB (v. 8) qt5-qtbase 5.15.3-7.el8, qt5-qtbase-gui 5.15.3-7.el8, qt5-qtbase-odbc 5.15.3-7.el8, qt5-qtbase-mysql 5.15.3-7.el8, qt5-qtbase-common 5.15.3-7.el8, qt5-qtbase-examples 5.15.3-7.el8, +1 more
    fixed: vendor fix RHSA-2024:3056
  • Red Hat Enterprise Linux CRB (v. 9) qt5-qtbase 5.15.9-9.el9, qt5-qtbase-gui 5.15.9-9.el9, qt5-qtbase-odbc 5.15.9-9.el9, qt5-qtbase-mysql 5.15.9-9.el9, qt5-qtbase-common 5.15.9-9.el9, qt5-qtbase-examples 5.15.9-9.el9, +1 more
    fixed: vendor fix RHSA-2024:2276

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
31 d ago

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.