RHSA-2026:99513 - Security Advisory

Topic

An update for the httpd:2.4 module is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

• httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)
• httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)
• httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)
• httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server (CVE-2026-44185)
• httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)
• httpd: Apache HTTP Server: Denial of Service in mod_proxy_ftp via attacker-controlled FTP server (CVE-2026-44186)
• httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc (CVE-2026-42536)
• httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)
• httpd: Apache HTTP Server: Out-of-bounds Read in mod_headers and mod_mime (CVE-2026-43951)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2374549 - CVE-2024-42516 httpd: incomplete fix for CVE-2023-38709
• BZ - 2465296 - CVE-2026-29169 httpd: NULL pointer dereference via specially crafted request
• BZ - 2486395 - CVE-2026-34356 httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers
• BZ - 2486397 - CVE-2026-44185 httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server
• BZ - 2486399 - CVE-2026-44631 httpd: Apache HTTP Server: Denial of Service via crafted regular expressions
• BZ - 2486402 - CVE-2026-44186 httpd: Apache HTTP Server: Denial of Service in mod_proxy_ftp via attacker-controlled FTP server
• BZ - 2486411 - CVE-2026-42536 httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc
• BZ - 2486414 - CVE-2026-34355 httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass
• BZ - 2486415 - CVE-2026-43951 httpd: Apache HTTP Server: Out-of-bounds Read in mod_headers and mod_mime

CVEs

• CVE-2024-42516
• CVE-2026-29169
• CVE-2026-34355
• CVE-2026-34356
• CVE-2026-42536
• CVE-2026-43951
• CVE-2026-44185
• CVE-2026-44186
• CVE-2026-44631

References

• https://access.redhat.com/security/updates/classification/#important