All vulnerabilities
CVE-2026-95509

Out-of-bounds read vulnerability in string formatting impacts Qt for MCUs

qt Qt for MCUs
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.31%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.11.3Also 2.12.3CVE List
Published29 Sep 2026Updated 29 Sep 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect String.arg() formatting by an incorrect buffer size calculation, causing out-of-bounds reading.

Text from CVE List

Affected versions 2

  • Qt for MCUsaffected: 2.6.0 before 2.11.3CVE List
  • Qt for MCUsaffected: 2.12.0 before 2.12.3CVE List

References 1