Bug 2511089 (CVE-2026-56848) - CVE-2026-56848 nodejs: Node.js: Heap-use-after-free in HTTP/2 handling can lead to denial of service
Summary: CVE-2026-56848 nodejs: Node.js: Heap-use-after-free in HTTP/2 handling can le...
Keywords:
Status: NEW
Alias: CVE-2026-56848
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2512447 2512448
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-04 17:01 UTC by OSIDB Bzimport
Modified: 2026-09-08 04:06 UTC (History)
5 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:61376 0 None None None 2026-08-31 11:24:14 UTC
Red Hat Product Errata RHSA-2026:61377 0 None None None 2026-08-31 12:06:20 UTC
Red Hat Product Errata RHSA-2026:61383 0 None None None 2026-08-31 14:28:42 UTC
Red Hat Product Errata RHSA-2026:61386 0 None None None 2026-08-31 14:24:42 UTC
Red Hat Product Errata RHSA-2026:62219 0 None None None 2026-09-01 19:41:03 UTC
Red Hat Product Errata RHSA-2026:62416 0 None None None 2026-09-02 07:31:54 UTC
Red Hat Product Errata RHSA-2026:62583 0 None None None 2026-09-02 11:50:03 UTC
Red Hat Product Errata RHSA-2026:64817 0 None None None 2026-09-08 04:06:20 UTC

Description OSIDB Bzimport 2026-08-04 17:01:22 UTC 
A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_mem_recv()` is executing, resulting in a heap-use-after-free.

This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.
Comment 3 errata-xmlrpc 2026-08-31 11:24:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61376 https://access.redhat.com/errata/RHSA-2026:61376
Comment 4 errata-xmlrpc 2026-08-31 12:06:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61377 https://access.redhat.com/errata/RHSA-2026:61377
Comment 5 errata-xmlrpc 2026-08-31 14:24:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:61386 https://access.redhat.com/errata/RHSA-2026:61386
Comment 6 errata-xmlrpc 2026-08-31 14:28:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:61383 https://access.redhat.com/errata/RHSA-2026:61383
Comment 7 errata-xmlrpc 2026-09-01 19:41:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62219 https://access.redhat.com/errata/RHSA-2026:62219
Comment 8 errata-xmlrpc 2026-09-02 07:31:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:62416 https://access.redhat.com/errata/RHSA-2026:62416
Comment 9 errata-xmlrpc 2026-09-02 11:50:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62583 https://access.redhat.com/errata/RHSA-2026:62583
Comment 10 errata-xmlrpc 2026-09-08 04:06:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:64817 https://access.redhat.com/errata/RHSA-2026:64817
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