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CVE-2025-10729· NVD / CVE Program· CNA TQtC

Use-after-free vulnerability in Qt SVG qsvghandler.cpp allows denial of service via crafted SVG

Noroxi assessment

Priority: Monitor (action score 37/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 qtsvg 6.6.1-2 on Azure Linux 3.0 6.6.1-3; cbl2 qt5-qtsvg 5.12.11-6 on CBL Mariner 2.0 5.12.11-7.

Low priority for now. Upgrade to azl3 qtsvg 6.6.1-2 on Azure Linux 3.0 6.6.1-3; cbl2 qt5-qtsvg 5.12.11-6 on CBL Mariner 2.0 5.12.11-7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The module will parse a <pattern> node which is not a child of a structural node. The node will be deleted after creation but might be accessed later leading to a use after free.

CriticalCVSS 9.4 · v4.0—No exploit Fix available
Published
Oct 3, 2025
Updated
Oct 8, 2026
EPSS
0.2% · 11th percentile

Report tools

JSON

Action score

37

Monitor

Low priority for now.

CVSS
37 / 40 · 9.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · TQtC
9.4
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:P/RE:H/U:Red

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-10729

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (TQtC). Independent of NVD's CPE analysis and usually ahead of it.

  • Qt Qt

    • 6.7.0 and later · up to and including 6.8.4affected · python
    • 6.9.0 and later · up to and including 6.9.2affected · python

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10qt6-qtsvgbefore 6.8.1-1.el10_0.16.8.1-1.el10_0.1
AlmaLinux:10qt6-qtsvg-develbefore 6.8.1-1.el10_0.16.8.1-1.el10_0.1
AlmaLinux:10qt6-qtsvg-examplesbefore 6.8.1-1.el10_0.16.8.1-1.el10_0.1
Debian:12qt6-svgfrom 0—
Debian:12qtsvg-opensource-srcfrom 0—
Debian:14qt6-svgbefore 6.10.2-56.10.2-5
openSUSE:Leap 16.0qt6-svgbefore 6.9.1-160000.3.16.9.1-160000.3.1
openSUSE:Leap 16.0qt6-svg-docsbefore 6.9.1-160000.3.16.9.1-160000.3.1
openSUSE:Tumbleweedqt6-svgbefore 6.10.0-1.16.10.0-1.1
Red Hat:enterprise_linux:10.0qt6-qtsvgbefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.0qt6-qtsvg-debuginfobefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.0qt6-qtsvg-debugsourcebefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.0qt6-qtsvg-develbefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.0qt6-qtsvg-examplesbefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.0qt6-qtsvg-tests-debuginfobefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
Red Hat:enterprise_linux:10.1qt6-qtsvgbefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Red Hat:enterprise_linux:10.1qt6-qtsvg-debuginfobefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Red Hat:enterprise_linux:10.1qt6-qtsvg-debugsourcebefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Red Hat:enterprise_linux:10.1qt6-qtsvg-develbefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Red Hat:enterprise_linux:10.1qt6-qtsvg-examplesbefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Red Hat:enterprise_linux:10.1qt6-qtsvg-tests-debuginfobefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Rocky Linux:10qt6-qtsvgbefore 0:6.9.1-2.el10_1.10:6.9.1-2.el10_1.1
Rocky Linux:10qt6-qtsvgbefore 0:6.8.1-1.el10_0.10:6.8.1-1.el10_0.1
SUSE:Linux Enterprise Server 16.0qt6-svgbefore 6.9.1-160000.3.16.9.1-160000.3.1

+1

Same product

qt: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-12267setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
    40Plan
  • CVE-2018-19873An issue was discovered in Qt before 5.11.3.
    40Plan
  • CVE-2017-10904Qt for Android prior to 5.9.0 allows remote attackers to execute arbitrary OS commands via unspecified vectors.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-5992Jul 11, 2025 · Passing values outside of expected range to QColorTransferGenericFunction can cause a denial of service
    9Monitor
  • ← EarlierCVE-2025-10728Oct 3, 2025 · Uncontrolled recursion in Qt SVG module
    37Monitor
  • Later →CVE-2025-6338Oct 16, 2025 · Possible denial of service with multiple incoming connections to a Schannel based server with a TLS backend
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 qtsvg 6.6.1-2 on Azure Linux 3.06.6.1-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 qt5-qtsvg 5.12.11-6 on CBL Mariner 2.05.12.11-7 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:qt6-qtsvg6.8.1-1.el10_0.1 · AlmaLinux:10Package registry (OSV)
almalinux:qt6-qtsvg-devel6.8.1-1.el10_0.1 · AlmaLinux:10Package registry (OSV)
almalinux:qt6-qtsvg-examples6.8.1-1.el10_0.1 · AlmaLinux:10Package registry (OSV)
debian:qt6-svg6.10.2-5 · Debian:14Package registry (OSV)
opensuse:qt6-svg6.10.0-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:qt6-svg-docs6.9.1-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:qt6-qtsvg0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:qt6-qtsvg-debuginfo0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:qt6-qtsvg-debugsource0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:qt6-qtsvg-devel0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:qt6-qtsvg-examples0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:qt6-qtsvg-tests-debuginfo0:6.8.1-1.el10_0.1 · Red Hat:enterprise_linux:10.0Package registry (OSV)
rocky linux:qt6-qtsvg0:6.8.1-1.el10_0.1 · Rocky Linux:10Package registry (OSV)
suse:qt6-svg6.9.1-160000.3.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:qt6-svg-docs6.9.1-160000.3.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-5991114 days apartUse after free in QHttp2ProtocolHandler
    8Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
P

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:H/U:Red

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records