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TI-2026-78598 Aliases CVE-2026-105923GHSA-fqj5-mj9g-cmjj

Null-pointer dereference in Qt QTriangulator via VectorImage

Priority LOW 18CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

Qt from 6.8.0 before 6.8.9 and from 6.9.0 before 6.11.3 is affected. A malicious SVG can trigger an integer overflow that leads to a null-pointer dereference (CWE-476) in QTriangulator, reached through the VectorImage QML type. A local attacker without privileges can cause a denial of service if a user actively loads the crafted file.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A malicious SVG can trigger an integer overflow which in turn triggers a null-pointer dereference in VectorImage QML Type.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0012 1st percentileScored 2026-11-07
Fix Partial Qt (qt): 6.8.9, 6.11.3Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
qtQt6.8.0 to before 6.8.9; 6.9.0 to before 6.11.36.8.9, 6.11.3Patch availableCNA
  • Qt Vendorqt Affected 6.8.0 to before 6.8.9; 6.9.0 to before 6.11.3 Fixed in 6.8.9, 6.11.3 Patch available CNA

CPE names CNA · 2

CPEVersionsRoleVendor
cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*——qt
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*——qt
  • cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:* Versions — — ·qt
  • cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:* Versions — — ·qt

Remediation

Upgrade Qt to 6.8.9 or 6.11.3. Red Hat's advisory RHSA-2026:89193 fixes Red Hat Hardened Images. Red Hat Enterprise Linux 10 is affected, and the sources list no fixed version for it.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Qt (qt) Fixed in 6.8.9, 6.11.3

Red Hat 1 advisory

  • RHSA-2026:89193 Released 2026-10-25 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images qt6-6.12.0-1.hum1@src, qt6-filesystem-6.12.0-1.hum1@aarch64, qt6-filesystem-6.12.0-1.hum1@s390x +7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:89193

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-105923
  2. 2026-10-21 Alias added: GHSA-fqj5-mj9g-cmjj
  3. 2026-10-21 Affected versions changed · Red Hat
  4. 2026-10-21 CVSS score added · Red Hat
  5. 2026-10-25 Fix available: RHSA-2026:89193 · Red Hat
  6. 2026-10-25 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-29 CISA SSVC decision points changed

References

Patch 1

Advisory 1

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences