CVE-2023-51714

Name: CVE-2023-51714
Creator: NVD / NIST
Published: 2023-12-24T21:15:25.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2023-51714 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.99%

57.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	10.0
Qt	Qt	>= 5.7, < 5.15.17
Qt	Qt	>= 6.0.0, < 6.2.11
Qt	Qt	>= 6.3.0, < 6.5.4
Qt	Qt	>= 6.6.0, < 6.6.2

References

https://codereview.qt-project.org/c/qt/qtbase/+/524864Patch, Product
https://codereview.qt-project.org/c/qt/qtbase/+/524865/3Patch, Product
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.htmlMailing List, Third Party Advisory
https://codereview.qt-project.org/c/qt/qtbase/+/524864Patch, Product
https://codereview.qt-project.org/c/qt/qtbase/+/524865/3Patch, Product
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.htmlMailing List, Third Party Advisory

Timeline

Published: Dec 24, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-51714?

How severe is CVE-2023-51714?

CVE-2023-51714 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2023-51714?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-51714?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST