RHSA-2026:98595 - Security Advisory

Topic

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 the CVE link(s) in the References section.

Description

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.

Security Fix(es):

• 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)
• flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems (CVE-2026-96280)
• flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer (CVE-2026-96808)
• flatpak: flatpak: Arbitrary file deletion in root context via path traversal in deploy directory export/bin (CVE-2026-97023)
• flatpak: flatpak: Arbitrary write in root context via path traversal in deploy directory files/etc (CVE-2026-97024)

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 10 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x

Fixes

• BZ - 2532613 - CVE-2026-90616 flatpak: Flatpak: Arbitrary code execution via missing symlink protection
• BZ - 2539416 - CVE-2026-96275 flatpak: flatpak: Arbitrary write access as root via extra-data extraction
• BZ - 2539419 - CVE-2026-96280 flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems
• BZ - 2539569 - CVE-2026-96808 flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer
• BZ - 2542625 - CVE-2026-97024 flatpak: flatpak: Arbitrary write in root context via path traversal in deploy directory files/etc

CVEs

• CVE-2026-90616
• CVE-2026-96275
• CVE-2026-96280
• CVE-2026-96808
• CVE-2026-97023
• CVE-2026-97024

References

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