flatpak: flatpak: Arbitrary write access as root via extra-data extraction

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extractextradata. On system installs, the write happens as root. Two issues combine: files/extra is resolved via path operations that follow symlinks, and blob nam...

Important: Red Hat Security Advisory: flatpak security update

An update for flatpak is now available for Red Hat Enterprise Linux 8. 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 t...

flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer

A flaw was found in Flatpak. A malicious local user in an active local session could exploit a symlink traversal vulnerability in the revokefs writer. This flaw allows an attacker to modify files belonging to a different revokefs session after they have been validated. Consequently, an attacker...

Important: Red Hat Security Advisory: flatpak security update

An update for flatpak is now available for Red Hat Enterprise Linux 9. 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 t...

flatpak: Flatpak: Arbitrary code execution via missing symlink protection

A flaw was found in Flatpak. A malicious sandboxed application can exploit missing symlink protection during the creation and bind-mounting of app data directories. By manipulating attacker-controlled path components, a malicious symlink can redirect these directories to arbitrary locations on th...

flatpak: flatpak: Arbitrary write access as root via extra-data extraction

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extractextradata. On system installs, the write happens as root. Two issues combine: files/extra is resolved via path operations that follow symlinks, and blob nam...

flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer

A flaw was found in Flatpak. A malicious local user in an active local session could exploit a symlink traversal vulnerability in the revokefs writer. This flaw allows an attacker to modify files belonging to a different revokefs session after they have been validated. Consequently, an attacker...

flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems

The OCI delta stream parser read sizes as guint64 but passed them to GLib I/O and allocation functions expecting gsize 32 bits on 32-bit systems, causing undersized allocations while subsequent operations use the original 64-bit size, leading to heap buffer overflows. An attacker controlling an O...

flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer

A flaw was found in Flatpak. A malicious local user in an active local session could exploit a symlink traversal vulnerability in the revokefs writer. This flaw allows an attacker to modify files belonging to a different revokefs session after they have been validated. Consequently, an attacker...

flatpak: flatpak: Arbitrary write access as root via extra-data extraction

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extractextradata. On system installs, the write happens as root. Two issues combine: files/extra is resolved via path operations that follow symlinks, and blob nam...

Important: Red Hat Security Advisory: flatpak security update

An update for flatpak is now available for Red Hat Enterprise Linux 10. 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...

flatpak: Flatpak: Arbitrary code execution via missing symlink protection

A flaw was found in Flatpak. A malicious sandboxed application can exploit missing symlink protection during the creation and bind-mounting of app data directories. By manipulating attacker-controlled path components, a malicious symlink can redirect these directories to arbitrary locations on th...

flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems

The OCI delta stream parser read sizes as guint64 but passed them to GLib I/O and allocation functions expecting gsize 32 bits on 32-bit systems, causing undersized allocations while subsequent operations use the original 64-bit size, leading to heap buffer overflows. An attacker controlling an O...

Important: Red Hat Security Advisory: flatpak-builder security update

An update for flatpak-builder is now available for Red Hat Enterprise Linux 9. 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 vulnerabilit...

flatpak-builder: Host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary...

Important: Red Hat Security Advisory: flatpak-builder security update

An update for flatpak-builder is now available for Red Hat Enterprise Linux 10. 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 vulnerabili...

flatpak-builder: Host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary...

RHEL 10 : flatpak-builder (RHSA-2026:80495)

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:80495 advisory. Flatpak-builder is a tool for building flatpaks from sources. Security Fixes: flatpak-builder: Host code execution via git am hook execution in pat...

ALSA-2026:80687 Important: flatpak security update

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Security Fixes: flatpak: Flatpak: Arbitrary code execution via missing symlink protection CVE-2026-90616 flatpak: flatpak: Arbitrary write access as root via extra-data extraction CVE-2026-96275...

Important: flatpak-builder security update

Flatpak-builder is a tool for building flatpaks from sources. Security Fixes: flatpak-builder: Host code execution via git am hook execution in patch source extraction use-git-am CVE-2026-86320 For more details about the security issues, including the impact, a CVSS score, acknowledgments, and...