CVE-2026-78227: Use-after-free in DoQ stream output buffer on reset re-transmission

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-17

EPSS Score

0.27% (percentile: 18.9%)

Affected Products (1)

Other

• 21878-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-17: Information published.