TI-2026-85039 Aliases CVE-2026-107479 GHSA-q929-xhmp-hf8w

Integer truncation in Qt QTextCodec conversion can crash applications

LOW 9CWE-197Published 2026-11-04 · Updated 2026-11-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: Active
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Qt versions from 5.0.0 through 6.8.8 and from 6.9.0 through 6.11.2 are affected. An integer truncation flaw (CWE-197) in the QTextCodec conversion functions of the Qt 5 Core Compatibility APIs module causes an integer to be truncated. A local attacker without privileges can crash an application that uses the affected functionality, though user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

An integer truncation vulnerability in the QTextCodec conversion functions of the Qt 5 Core Compatibility APIs module impacts the Qt Framework. An application using the affected functionality could crash.

Why it matters now

EPSS 0.00163 5th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
qt	Qt	5.0.0 – 6.8.8; 6.9.0 – 6.11.2	—	No fix listed	CNA

Qt Vendorqt Affected 5.0.0 – 6.8.8; 6.9.0 – 6.11.2 Fixed in — No fix listed CNA

CPE names CNA · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:qt:qt::::::::	—	—	qt
cpe:2.3:a:qt:qt5compat::::::::	—	—	qt
cpe:2.3:a:qt:qtbase::::::::	—	—	qt

cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:* Versions — — ·qt
cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:* Versions — — ·qt
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:* Versions — — ·qt

Remediation

The sources list no fixed version for Qt. Red Hat lists Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10 and Red Hat Hardened Images as affected without a fix, and Red Hat has no plan available for Red Hat Enterprise Linux 10 and Red Hat Hardened Images.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	—
Red Hat Enterprise Linux 9	Affected	—
Red Hat Hardened Images	Affected	No fix yet

Timeline

2026-11-04 Threatist record created from CVE-2026-107479
2026-11-04 Alias added: GHSA-q929-xhmp-hf8w
2026-11-06 Affected versions changed · Red Hat
2026-11-06 CVSS score added · Red Hat

References

Patch 1

https://codereview.qt-project.org/c/qt/qt5compat/+/763226

Advisory 1

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107479:

TI-2024-23902 QAbstractOAuth in Qt Network Authorization in Qt before 5.15.17, 6.x before 6.2.13, 6.3.x… CVSS 3.1CRITICAL 9.8
TI-2022-21359 Heap-based buffer overflow in Qt CVSS 3.1HIGH 8.8
TI-2022-19524 Integer overflow in Qt CVSS 3.1HIGH 8.8
TI-2023-18997 In Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2, there can… CVSS 3.1HIGH 7.5
TI-2021-09305 Integer Overflow vulnerability in qsvghandler.cpp in Qt qtsvg versions 5.15.1, 6.0.0… CVSS 3.1MEDIUM 5.5
TI-2023-28356 An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before… CVSS 3.1CRITICAL 9.8

See all 106 →

Sources

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