ALAS2023-2026-3398

References: CVE-2026-103242  CVE-2026-84837  CVE-2026-95519 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content -- of attacker-chosen length -- past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package. (CVE-2026-103242)

A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly relevant in automated build or continuous integration (CI) workflows that ingest externally supplied artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the build user, which could lead to information disclosure or disruption of the build environment. (CVE-2026-84837)

A flaw was found in rpm. An attacker can supply a crafted manifest file that, when processed by a user or automation using `rpm -q -p` or similar manifest-processing flows, leads to arbitrary code execution. This occurs because manifest entries are unexpectedly macro-expanded before being opened, allowing embedded shell commands to run with the privileges of the `rpm` process. Successful exploitation can lead to a full compromise of confidentiality, integrity, and availability for the affected account. (CVE-2026-95519)

Issue Correction:
Run dnf update rpm --releasever 2023.12.20261109 or dnf update --advisory ALAS2023-2026-3398 --releasever 2023.12.20261109 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:
    rpm-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-fapolicyd-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-build-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-fapolicyd-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-prioreset-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-sign-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-debugsource-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-devel-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-systemd-inhibit-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-build-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-ima-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-build-libs-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-selinux-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-ima-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-audit-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-syslog-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    python3-rpm-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-selinux-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-prioreset-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-devel-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-syslog-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-systemd-inhibit-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-sign-debuginfo-4.16.1.3-29.amzn2023.0.9.aarch64
    python3-rpm-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-libs-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-sign-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-sign-libs-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-plugin-audit-4.16.1.3-29.amzn2023.0.9.aarch64
    rpm-build-4.16.1.3-29.amzn2023.0.9.aarch64

noarch:
    rpm-apidocs-4.16.1.3-29.amzn2023.0.9.noarch
    rpm-cron-4.16.1.3-29.amzn2023.0.9.noarch

src:
    rpm-4.16.1.3-29.amzn2023.0.9.src

x86_64:
    rpm-build-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-sign-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-syslog-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-build-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-audit-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-systemd-inhibit-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-build-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-libs-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-debugsource-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-fapolicyd-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-selinux-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-prioreset-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-sign-libs-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-ima-4.16.1.3-29.amzn2023.0.9.x86_64
    python3-rpm-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-ima-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-devel-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    python3-rpm-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-prioreset-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-sign-libs-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-sign-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-selinux-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-build-libs-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-audit-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-systemd-inhibit-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-fapolicyd-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-debuginfo-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-devel-4.16.1.3-29.amzn2023.0.9.x86_64
    rpm-plugin-syslog-4.16.1.3-29.amzn2023.0.9.x86_64