Amazon Linux 2023 Security Advisory: ALAS2023-2026-1859
Advisory Released Date: 2026-06-22
Advisory Updated Date: 2026-06-22
Severity:
Important
Issue Overview:
Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted.
This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67. (CVE-2026-48913)
Denial of service in HTTP/2 cookie request header counting (CVE-2026-49975)
Affected Packages:
mod_http2
Issue Correction:
Run dnf update mod_http2 --releasever 2023.12.20260622 or dnf update --advisory ALAS2023-2026-1859 --releasever 2023.12.20260622 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
mod_http2-debugsource-2.0.42-1.amzn2023.0.1.aarch64
mod_http2-debuginfo-2.0.42-1.amzn2023.0.1.aarch64
mod_http2-2.0.42-1.amzn2023.0.1.aarch64
src:
mod_http2-2.0.42-1.amzn2023.0.1.src
x86_64:
mod_http2-debuginfo-2.0.42-1.amzn2023.0.1.x86_64
mod_http2-debugsource-2.0.42-1.amzn2023.0.1.x86_64
mod_http2-2.0.42-1.amzn2023.0.1.x86_64