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.
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Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-12-24. NVD baseline CVSS 9.8; sources differ by 0.0.
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.
December 24, 2023
March 20, 2025
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | qtbase5-private-dev (5.5.1+dfsg-16ubuntu7.7+esm2) @ xenial | 2026-05-24 | ubuntu |
| redhat | qt5-qtbase-0:5.15.3-7.el8 | 2024-05-22 | redhat |
| redhat | qt5-qtbase-0:5.15.9-9.el9 | 2024-04-30 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
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.
RHSA-2024:2276 — Moderate
RHSA-2024:3056 — Moderate
Qt vulnerabilities
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msrc · redhat
CWE-190