Bug 2459282

Summary:	CVE-2026-40170 ngtcp2: ngtcp2: Denial of service via stack buffer overflow during QUIC handshake [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Marco Benatto <mbenatto>
Component:	ngtcp2	Assignee:	Petr Menšík <pemensik>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	epel10	CC:	asn, crypto-team, dns-sig, pemensik
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["443e0f07-54d3-45d9-99ce-47b2ca786efc"]}
Fixed In Version:	ngtcp2-1.22.1-1.el9 ngtcp2-1.22.1-1.el10_3	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-04-30 01:17:46 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2459061

Description Marco Benatto 2026-04-17 20:15:07 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Comment 1 Fedora Update System 2026-04-20 14:31:53 UTC

FEDORA-EPEL-2026-146c20fe60 (ngtcp2-1.22.1-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-146c20fe60

Comment 2 Fedora Update System 2026-04-20 14:32:30 UTC

FEDORA-EPEL-2026-fca0ff7545 (ngtcp2-1.22.1-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-fca0ff7545

Comment 3 Fedora Update System 2026-04-22 10:18:28 UTC

FEDORA-EPEL-2026-146c20fe60 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-146c20fe60

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-04-22 10:23:20 UTC

FEDORA-EPEL-2026-fca0ff7545 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-fca0ff7545

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-04-30 01:17:46 UTC

FEDORA-EPEL-2026-fca0ff7545 (ngtcp2-1.22.1-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-04-30 01:29:31 UTC

FEDORA-EPEL-2026-146c20fe60 (ngtcp2-1.22.1-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.