Bug 2548344 (CVE-2026-78669)

Summary: CVE-2026-78669 net/http: net/http/internal/http2: golang.org/x/net/http2: net/http: Denial of Service via excessive HTTP/2 SETTINGS frames
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, abarbaro, akhatavk, akostadi, alizardo, amasferr, amctagga, ansmith, anthomas, aoconnor, aos-team-art-private, asdas, bbrownin, bniver, chfoley, cmah, crizzo, dakwon, dhanak, dkeler, dmayorov, dpaolell, drosa, dschmidt, dsimansk, eaguilar, ebaron, eborisov, eglynn, ehelms, flucifre, ggainey, gmeno, groman, jbritton, jburrell, jchui, jdelft, jhe, jjoyce, jlanda, jlledo, jmatsuok, jpasqual, jpretori, jschluet, jtolenti, jturenov, jupierce, juwatts, kaycoth, kingland, kshier, ktsao, lball, lblicha, lchilton, lgarciaa, lhh, mbenjamin, mbiarnes, mburns, mdellweg, mgarciac, mhackett, mhulan, mnovotny, nboldt, ngough, nmoumoul, oaljalju, ogajduse, osousa, pantinor, pcreech, pjindal, ppalepu, ppostler, prdhamdh, psrna, rbobbitt, rchan, rhel-process-autobot, sausingh, sdawley, sfeifer, sghai, sidsharm, simaishi, smallamp, sostapov, stcannon, suppawar, swoodman, thason, tmalecek, tsedmik, vereddy, veshanka, vkarehfa, vlaad, watson-tool-maintainers, yguenane, zhunting
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Go net/http package. This flaw allows a remote attacker to cause a Denial of Service (DoS) by triggering excessive CPU consumption on an affected client or server. By opening a large number of HTTP/2 streams and repeatedly sending small configuration (SETTINGS) frames that modify window sizes, an attacker forces the system into intensive state processing. This resource exhaustion degrades performance and can render the service unresponsive.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-08 23:01:52 UTC
A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

Comment 3 Jon Orris 2026-10-20 20:27:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:86093 https://access.redhat.com/errata/RHSA-2026:86093

Comment 4 Jon Orris 2026-10-20 21:57:47 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:86203 https://access.redhat.com/errata/RHSA-2026:86203

Comment 5 Jon Orris 2026-10-20 22:53:49 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:86196 https://access.redhat.com/errata/RHSA-2026:86196

Comment 7 Jon Orris 2026-10-22 11:42:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:88188 https://access.redhat.com/errata/RHSA-2026:88188

Comment 8 Jon Orris 2026-10-22 11:59:48 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:88189 https://access.redhat.com/errata/RHSA-2026:88189

Comment 9 Jon Orris 2026-10-22 14:55:00 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:88262 https://access.redhat.com/errata/RHSA-2026:88262

Comment 10 Jon Orris 2026-10-22 15:06:39 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:88280 https://access.redhat.com/errata/RHSA-2026:88280

Comment 11 Jon Orris 2026-10-22 15:40:26 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:88316 https://access.redhat.com/errata/RHSA-2026:88316

Comment 13 Jon Orris 2026-10-22 17:01:59 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:88336 https://access.redhat.com/errata/RHSA-2026:88336

Comment 14 Jon Orris 2026-10-22 17:40:00 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:88354 https://access.redhat.com/errata/RHSA-2026:88354

Comment 19 Jon Orris 2026-10-26 02:28:35 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:89741 https://access.redhat.com/errata/RHSA-2026:89741

Comment 20 Jon Orris 2026-10-26 02:56:22 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:89744 https://access.redhat.com/errata/RHSA-2026:89744

Comment 21 Jon Orris 2026-10-26 03:04:25 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:89740 https://access.redhat.com/errata/RHSA-2026:89740

Comment 22 Jon Orris 2026-10-26 03:19:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:89751 https://access.redhat.com/errata/RHSA-2026:89751

Comment 23 Jon Orris 2026-10-26 08:45:09 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:89832 https://access.redhat.com/errata/RHSA-2026:89832

Comment 24 Jon Orris 2026-10-26 09:53:47 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:89884 https://access.redhat.com/errata/RHSA-2026:89884

Comment 25 Jon Orris 2026-10-26 10:29:55 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:89888 https://access.redhat.com/errata/RHSA-2026:89888

Comment 26 Jon Orris 2026-10-26 10:31:16 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:89885 https://access.redhat.com/errata/RHSA-2026:89885

Comment 27 Jon Orris 2026-10-26 10:31:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:89892 https://access.redhat.com/errata/RHSA-2026:89892

Comment 28 Jon Orris 2026-10-26 11:17:35 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:89908 https://access.redhat.com/errata/RHSA-2026:89908

Comment 29 Jon Orris 2026-10-26 12:18:43 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:89915 https://access.redhat.com/errata/RHSA-2026:89915

Comment 30 Jon Orris 2026-10-26 14:42:13 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:89914 https://access.redhat.com/errata/RHSA-2026:89914

Comment 31 Jon Orris 2026-10-26 15:01:13 UTC
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 17.1 for RHEL 9

Via RHSA-2026:90329 https://access.redhat.com/errata/RHSA-2026:90329

Comment 32 Jon Orris 2026-10-26 15:02:29 UTC
This issue has been addressed in the following products:

  Red Hat OpenStack Services on OpenShift 18.0

Via RHSA-2026:90332 https://access.redhat.com/errata/RHSA-2026:90332

Comment 33 Jon Orris 2026-10-26 15:05:59 UTC
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.2

Via RHSA-2026:90330 https://access.redhat.com/errata/RHSA-2026:90330

Comment 34 Jon Orris 2026-10-26 15:16:51 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:89933 https://access.redhat.com/errata/RHSA-2026:89933

Comment 35 Jon Orris 2026-10-27 04:34:16 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:90725 https://access.redhat.com/errata/RHSA-2026:90725

Comment 36 Jon Orris 2026-10-27 04:36:20 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:90726 https://access.redhat.com/errata/RHSA-2026:90726

Comment 37 Jon Orris 2026-10-27 17:00:30 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:90994 https://access.redhat.com/errata/RHSA-2026:90994

Comment 38 Jon Orris 2026-10-27 20:41:39 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:91138 https://access.redhat.com/errata/RHSA-2026:91138

Comment 39 Jon Orris 2026-10-28 04:37:59 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:91572 https://access.redhat.com/errata/RHSA-2026:91572

Comment 40 Jon Orris 2026-10-28 07:37:05 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:91587 https://access.redhat.com/errata/RHSA-2026:91587

Comment 41 Jon Orris 2026-10-28 11:33:33 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:91646 https://access.redhat.com/errata/RHSA-2026:91646

Comment 42 Jon Orris 2026-10-28 15:56:39 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:91958 https://access.redhat.com/errata/RHSA-2026:91958

Comment 43 Jon Orris 2026-10-29 04:25:39 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:92217 https://access.redhat.com/errata/RHSA-2026:92217

Comment 44 Jon Orris 2026-10-29 14:21:44 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:92372 https://access.redhat.com/errata/RHSA-2026:92372

Comment 46 Jon Orris 2026-10-29 19:39:29 UTC
This issue has been addressed in the following products:

  Red Hat Ansible Automation Platform 2.7 for RHEL 10
  Red Hat Ansible Automation Platform 2.7 for RHEL 9

Via RHSA-2026:92622 https://access.redhat.com/errata/RHSA-2026:92622

Comment 47 Jon Orris 2026-10-29 19:56:49 UTC
This issue has been addressed in the following products:

  Red Hat Ansible Automation Platform 2.6 for RHEL 9
  Red Hat Ansible Automation Platform 2.6 for RHEL 10

Via RHSA-2026:92621 https://access.redhat.com/errata/RHSA-2026:92621

Comment 48 Jon Orris 2026-10-29 21:36:42 UTC
This issue has been addressed in the following products:

  Red Hat Satellite 6.18 for RHEL 9

Via RHSA-2026:92860 https://access.redhat.com/errata/RHSA-2026:92860

Comment 49 Jon Orris 2026-10-29 21:38:06 UTC
This issue has been addressed in the following products:

  Red Hat Satellite 6.16 for RHEL 8
  Red Hat Satellite 6.16 for RHEL 9

Via RHSA-2026:92858 https://access.redhat.com/errata/RHSA-2026:92858

Comment 50 Jon Orris 2026-10-29 21:40:27 UTC
This issue has been addressed in the following products:

  Red Hat Satellite 6.17 for RHEL 9

Via RHSA-2026:92859 https://access.redhat.com/errata/RHSA-2026:92859

Comment 51 Jon Orris 2026-11-02 10:52:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:93596 https://access.redhat.com/errata/RHSA-2026:93596

Comment 52 Jon Orris 2026-11-02 12:44:14 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:93617 https://access.redhat.com/errata/RHSA-2026:93617

Comment 55 Jon Orris 2026-11-04 07:33:32 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:95016 https://access.redhat.com/errata/RHSA-2026:95016

Comment 56 Jon Orris 2026-11-04 07:43:54 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:95015 https://access.redhat.com/errata/RHSA-2026:95015

Comment 57 Jon Orris 2026-11-04 07:48:22 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:95014 https://access.redhat.com/errata/RHSA-2026:95014

Comment 58 Jon Orris 2026-11-04 15:41:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:95234 https://access.redhat.com/errata/RHSA-2026:95234

Comment 59 Jon Orris 2026-11-04 21:47:35 UTC
This issue has been addressed in the following products:

  Cryostat 4 on RHEL 9

Via RHSA-2026:95360 https://access.redhat.com/errata/RHSA-2026:95360

Comment 60 Jon Orris 2026-11-05 12:28:05 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:95519 https://access.redhat.com/errata/RHSA-2026:95519