Bug 2512090 (CVE-2026-73549) - CVE-2026-73549 envoy: envoy: scoped IPv6 handling crash for HTTP/3 clients in original DST clusters
Summary: CVE-2026-73549 envoy: envoy: scoped IPv6 handling crash for HTTP/3 clients in...
Keywords:
Status: NEW
Alias: CVE-2026-73549
Deadline: 2026-08-26
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-06 15:01 UTC by OSIDB Bzimport
Modified: 2026-08-31 16:23 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-08-06 15:01:24 UTC 
An incomplete correction for scoped IPv6 addresses in original DST clusters. HTTP/3 requests from scoped IPv6 client addresses could cause an abnormal process termination while Envoy copied the client address and port.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (5.3)

Embargoed until 2026-08-26 13:00 GMT per Envoy upstream disclosure. PSIRTSUPT-21132.
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