RHSA-2026:80498HighCVSS 8.8

Red Hat Security Advisory: flatpak security update

Published
October 12, 2026
Last Modified
November 2, 2026

🔗 CVE IDs covered (4)

CVE-2026-96808 →CVE-2026-90616 →CVE-2026-96275 →CVE-2026-96280 →

📋 Description

CVE-2026-90616 — flatpak: Flatpak: Arbitrary code execution via missing symlink protection CVE-2026-96275 — flatpak: flatpak: Arbitrary write access as root via extra-data extraction CVE-2026-96280 — flatpak: flatpak: Buffer overflow in OCI delta stream path names on 32-bit systems CVE-2026-96808 — flatpak: Flatpak: Local privilege escalation via symlink traversal in revokefs writer

🎯 Affected products60

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-0:1.16.0-9.el10_2.4.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debuginfo-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-debugsource-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-devel-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-devel-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-devel-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-devel-0:1.16.0-9.el10_2.4.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • flatpak-libs-0:1.16.0-9.el10_2.4.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-libs-0:1.16.0-9.el10_2.4.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • flatpak-libs-0:1.16.0-9.el10_2.4.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • +30 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To reduce the risk of exploitation, users should only install Flatpak applications from trusted sources. Regularly reviewing and removing unnecessary or untrusted Flatpak applications can further limit exposure. Workaround: Avoid installing Flatpak extensions from non-trusted sources. Workaround: Only install applications from trusted OCI registries. Flatpak remotes using the default OSTree transport are not affected. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

🔗 References (7)