RLSA-2026:98555: Important: buildah security update
The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables you to: Create a working container, either from scratch or using an image as a starting point; Create an image, either from a working container or using the instructions in a Dockerfile; Build both Docker and OCI images.
Security Fix(es):
encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)
net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)
html/template: golang: Go html/template: Cross-Site Scripting via pathological input (CVE-2026-56858)
crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/buildah-debuginfoto a version that resolves this vulnerability.Fixed in 2:1.45.0-2.el10 - Upgrade
Upgrade
rocky-linux/buildahto a version that resolves this vulnerability.Fixed in 2:1.45.0-2.el10 - Upgrade
Upgrade
rocky-linux/buildah-debugsourceto a version that resolves this vulnerability.Fixed in 2:1.45.0-2.el10 - Upgrade
Upgrade
rocky-linux/buildah-tests-debuginfoto a version that resolves this vulnerability.Fixed in 2:1.45.0-2.el10 - Upgrade
Upgrade
rocky-linux/buildah-teststo a version that resolves this vulnerability.Fixed in 2:1.45.0-2.el10
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Which installed package variants are covered by this update?
The advisory lists buildah, buildah-debuginfo, buildah-debugsource, buildah-tests, and buildah-tests-debuginfo for Rocky Linux.
What exploitation prerequisites are indicated by the supplied CVSS vector?
The supplied vector indicates network reachability, low attack complexity, no required privileges, and required user interaction. It also indicates high confidentiality and integrity impact, with no availability impact in that vector.