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CVE-2026-102557

Libsoup: libsoup: heap buffer overflow during websocket message reassembly

CVSS 3.1 8.6 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 2 Nov 2026 04:57:17 UTC. Read the latest advisory.

cve-program · CVE-2026-102557

Published

A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-102557

Published

libsoup3

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": "libsoup3",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:3.6.5-3.el10_2.20",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.2"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-19.el8_10",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8::appstream",
                        "cpe:/o:redhat:enterprise_linux:8::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-19.el8_10",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8::appstream",
                        "cpe:/o:redhat:enterprise_linux:8::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-2.el8_4.14",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream",
                        "cpe:/o:redhat:rhel_aus:8.4::baseos",
                        "cpe:/o:redhat:rhel_eus_long_life:8.4::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-2.el8_4.14",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream",
                        "cpe:/o:redhat:rhel_aus:8.4::baseos",
                        "cpe:/o:redhat:rhel_eus_long_life:8.4::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-3.el8_8.15",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream",
                        "cpe:/o:redhat:rhel_e4s:8.8::baseos",
                        "cpe:/o:redhat:rhel_tus:8.8::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.62.3-3.el8_8.15",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream",
                        "cpe:/o:redhat:rhel_e4s:8.8::baseos",
                        "cpe:/o:redhat:rhel_tus:8.8::baseos"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.72.0-16.el9_8.8",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.72.0-8.el9_2.18",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.2::appstream"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:2.72.0-8.el9_4.17",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.4::appstream"
                    ]
                }

libsoup

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 6",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libsoup",
                    "defaultStatus": "unknown",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:6"
                    ]
                }

libsoup

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": "libsoup",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:7"
                    ]
                }

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

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