RHSA-2026:99010HighCVSS 8.8

Red Hat Security Advisory: flatpak security update

Published
November 11, 2026
Last Modified
November 11, 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 products27

  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-0:1.12.9-6.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-0:1.12.9-6.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-0:1.12.9-6.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-0:1.12.9-6.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-0:1.12.9-6.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-builder-1:1.0.0-18.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-builder-1:1.0.0-18.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-builder-1:1.0.0-18.el7_9.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-builder-1:1.0.0-18.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-debuginfo-0:1.12.9-6.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-devel-0:1.12.9-6.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-devel-0:1.12.9-6.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-devel-0:1.12.9-6.el7_9.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-devel-0:1.12.9-6.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • flatpak-libs-0:1.12.9-6.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-libs-0:1.12.9-6.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-libs-0:1.12.9-6.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS)
  • flatpak-libs-0:1.12.9-6.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS)

✅ 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)