CVE-2025-3512: Qtbase opensource src gles · There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter
Affects qtbase-opensource-src-glesSource GCVE Database
Not known to be exploited · CVSS 4.8 Medium.
Data as of 28 Oct 2026, 22:28 UTC
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:ClearExploitation evidence
Disclosed: evidence found.
CVE published 11 Apr 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10qt6-basepkg:deb/ubuntu/qt6-base?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10qtbase-opensource-src-glespkg:deb/ubuntu/qtbase-opensource-src-gles?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSqt6-basepkg:deb/ubuntu/qt6-base?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSqtbase-opensource-src-glespkg:deb/ubuntu/qtbase-opensource-src-gles?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 25.10qt6-basepkg:deb/ubuntu/qt6-base?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10qtbase-opensource-src-glespkg:deb/ubuntu/qtbase-opensource-src-gles?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter. This requires an incorrectly formatted markdown file to be passed to QTextMarkdownImporter to trigger the overflow. This issue affects Qt from 6.8.0 to 6.8.4. Versions up to 6.6.0 are known to be unaffected, and the fix is in 6.8.4 and later.