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TI-2026-09995 Aliases CVE-2026-11573GHSA-m72v-p257-4w4p

Uncontrolled recursion in QDomDocument/QDomNode serialization causes stack exhaustion (QtXml)

Priority LOW 31CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 13 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-674.

Summary

Uncontrolled recursion (CWE-674) in the QDomDocument/QDomNode serialization path of the Qt XML module (QtXml, qtbase). QDomElementPrivate::save() and QDomNodePrivate::save() recurse mutually, consuming one stack frame per level of element nesting with no depth limit, no configurable bound and no error return. A document with deeply nested elements parses successfully but exhausts the call stack and terminates the process when serialized. Reachable via QDomDocument::toByteArray() (Qt 4.0 and later), QDomDocument::toString(), QDomDocument::toCString(), QDomNode::save(), and operator<<(QTextStream&, const QDomNode&). Denial of service only — no code execution and no memory disclosure.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00387 33rd percentileScored 2026-11-07
Fix Partial qt (qt): 6.8.2Red Hat: 8 advisoriesRed Hat: 13 fixed, 3 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
qtqt2.2.0 to before 6.8.26.8.2Patch availableCNA
  • qt Vendorqt Affected 2.2.0 to before 6.8.2 Fixed in 6.8.2 Patch available CNA

Remediation

  • Fix · CNA qt (qt) Fixed in 6.8.2

Red Hat 8 advisories

  • RHSA-2026:95619 Released 2026-11-05 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) qt5-qtbase-5.15.2-5.el8_6.2, qt5-qtbase-common-5.15.2-5.el8_6.2, qt5-qtbase-devel-5.15.2-5.el8_6.2 +6
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) qt5-qtbase-5.15.2-5.el8_6.2, qt5-qtbase-common-5.15.2-5.el8_6.2, qt5-qtbase-devel-5.15.2-5.el8_6.2 +6
  • RHSA-2026:95588 Released 2026-11-05 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) qt5-qtbase-5.15.9-11.el9_4.2, qt5-qtbase-common-5.15.9-11.el9_4.2, qt5-qtbase-devel-5.15.9-11.el9_4.2 +6
  • RHSA-2026:95575 Released 2026-11-05 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) qt5-qtbase-static-5.15.9-11.el9_6.2
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) qt5-qtbase-5.15.9-11.el9_6.2, qt5-qtbase-common-5.15.9-11.el9_6.2, qt5-qtbase-devel-5.15.9-11.el9_6.2 +6
Show 5 more Red Hat advisories
  • RHSA-2026:95574 Released 2026-11-05 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) qt5-qtbase-5.15.3-2.el9_2.3, qt5-qtbase-common-5.15.3-2.el9_2.3, qt5-qtbase-devel-5.15.3-2.el9_2.3 +6
  • RHSA-2026:93924 Released 2026-11-02 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase-5.15.3-10.el8_10, qt5-qtbase-common-5.15.3-10.el8_10, qt5-qtbase-devel-5.15.3-10.el8_10 +6
    • Red Hat Enterprise Linux CRB (v. 8) qt5-qtbase-static-5.15.3-10.el8_10
  • RHSA-2026:87082 Released 2026-10-21 · Red Hat rating Important
    qt5-qtbase security update
    • Red Hat Enterprise Linux AppStream (v. 9) qt5-qtbase-5.15.9-11.el9_8.2, qt5-qtbase-common-5.15.9-11.el9_8.2, qt5-qtbase-devel-5.15.9-11.el9_8.2 +6
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) qt5-qtbase-static-5.15.9-11.el9_8.2
  • RHSA-2026:84582 Released 2026-10-19 · Red Hat rating Important
    qt6-qtbase security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) qt6-qtbase-6.8.1-9.el10_0.1, qt6-qtbase-common-6.8.1-9.el10_0.1, qt6-qtbase-devel-6.8.1-9.el10_0.1 +4
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) qt6-qtbase-examples-6.8.1-9.el10_0.1, qt6-qtbase-private-devel-6.8.1-9.el10_0.1, qt6-qtbase-static-6.8.1-9.el10_0.1
  • RHSA-2026:74653 Released 2026-10-01 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images qt6-qtbase-6.11.2-3.hum1@aarch64, qt6-qtbase-6.11.2-3.hum1@src, qt6-qtbase-6.11.2-3.hum1@x86_64 +20

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Hardened ImagesAffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:95575
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:93924
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:87082
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:95619
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:95574
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:95588
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:84582
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:95575
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:95619
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:93924
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:87082
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:84582
Red Hat Hardened ImagesFixed RHSA-2026:74653

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11573
  2. 2026-10-03 Alias added: GHSA-m72v-p257-4w4p
  3. 2026-10-08 Affected versions changed · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:74653 · Red Hat
  5. 2026-10-09 Fix available: Red Hat Hardened Images · Red Hat
  6. 2026-10-19 Fix available: RHSA-2026:84582 · Red Hat
  7. 2026-10-19 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · Red Hat
  8. 2026-10-21 Fix available: RHSA-2026:87082 · Red Hat
  9. 2026-10-21 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  10. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  11. 2026-11-03 Fix available: RHSA-2026:93924 · Red Hat
  12. 2026-11-05 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.9.2) +3 · Red Hat
  13. 2026-11-06 Fix available: RHSA-2026:95575 · Red Hat
  14. 2026-11-06 Fix available: RHSA-2026:95588 · Red Hat
  15. 2026-11-06 Fix available: RHSA-2026:95574 · Red Hat
  16. 2026-11-06 Fix available: RHSA-2026:95619 · Red Hat

References

Patch 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