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CVE-2026-96280

Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 11 Nov 2026 13:57:25 UTC. Read the latest advisory.

cve-program · CVE-2026-96280

Published

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 OCI registry can craft a delta stream that triggers this during flatpak install/update, potentially achieving code execution on 32-bit systems.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-96280

Published

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.16.0-9.el10_2.4",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.2"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.16.0-5.el10_0.6",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux_eus:10.0"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-7.el8_10",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8::appstream",
                        "cpe:/a:redhat:enterprise_linux:8::crb"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-2.el8_4.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-2.el8_4.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-1.el8_6.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.6::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-1.el8_6.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.6::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-1.el8_8.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-1.el8_8.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-4.el9_8.4",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/a:redhat:enterprise_linux:9::crb"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-6.el9_9.5",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream",
                        "cpe:/a:redhat:enterprise_linux:9::crb"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.7-5.el9_2.5",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.2::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-3.el9_4.5",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.4::appstream"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.12.9-4.el9_6.5",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_eus:9.6::appstream",
                        "cpe:/a:redhat:rhel_eus:9.6::crb"
                    ]
                }

flatpak

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:7"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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