CVE-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. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-25)

CWE

CWE-190

Published

2023-12-24

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• qt:qt

References

• https://codereview.qt-project.org/c/qt/qtbase/+/524864
• https://codereview.qt-project.org/c/qt/qtbase/+/524865/3
• https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
• https://codereview.qt-project.org/c/qt/qtbase/+/524864
• https://codereview.qt-project.org/c/qt/qtbase/+/524865/3

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