Bug 2464953 (CVE-2026-33857)

Summary:	CVE-2026-33857 httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	csutherl, jclere, pjindal, plodge, rhel-process-autobot, szappis, valet-crappie0k, vchlup, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the mod_proxy_ajp module of httpd. When processing AJP (Apache JServ Protocol) messages, the AJP getter functions attempt to read data beyond the allocated buffer size, allowing an attacker or a malformed request to cause an out-of-bounds read. This issue leads to a denial of service.	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:
Bug Depends On:	2469243
Bug Blocks:

Description OSIDB Bzimport 2026-05-04 14:01:34 UTC

Out-of-bounds Read vulnerability in mod_proxy_ajp of 

Apache HTTP Server.

This issue affects Apache HTTP Server: through 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Comment 4 errata-xmlrpc 2026-05-27 17:31:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:21391 https://access.redhat.com/errata/RHSA-2026:21391

Comment 5 errata-xmlrpc 2026-05-27 21:26:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:21433 https://access.redhat.com/errata/RHSA-2026:21433

Comment 6 errata-xmlrpc 2026-06-01 02:26:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:22140 https://access.redhat.com/errata/RHSA-2026:22140

Comment 7 errata-xmlrpc 2026-06-22 15:13:24 UTC

This issue has been addressed in the following products:

  Red Hat JBoss Core Services 2.4.62.SP4

Via RHSA-2026:27201 https://access.redhat.com/errata/RHSA-2026:27201

Comment 8 errata-xmlrpc 2026-06-22 15:15:18 UTC

This issue has been addressed in the following products:

  JBoss Core Services on RHEL 7
  JBoss Core Services for RHEL 8

Via RHSA-2026:27200 https://access.redhat.com/errata/RHSA-2026:27200

Comment 9 errata-xmlrpc 2026-07-07 21:41:53 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-2026:36373 https://access.redhat.com/errata/RHSA-2026:36373

Comment 10 errata-xmlrpc 2026-07-08 17:54:36 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-2026:36831 https://access.redhat.com/errata/RHSA-2026:36831

Comment 11 errata-xmlrpc 2026-07-08 19:29:05 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-2026:36846 https://access.redhat.com/errata/RHSA-2026:36846

Comment 12 errata-xmlrpc 2026-07-28 08:59:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:47046 https://access.redhat.com/errata/RHSA-2026:47046