CVE-2026-15711
Fixed in a distro release EPSS <1%CVSS 7.5
A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (e.g., PING, PONG, CLOSE) contain a payload of 125 bytes or less. A remote, unauthenticated attacker can exploit this by sending a non-compliant, oversized control frame. Because the parser handles this protocol violation improperly instead of throwing an immediate connection termination error, it triggers a internal processing crash, resulting in a remote denial of service (DoS) for applications utilizing libsoup WebSockets.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | libsoup3 | 3.6.5-3.el10_2.14 |
| AlmaLinux 10 | libsoup3-devel | 3.6.5-3.el10_2.14 |
| AlmaLinux 10 | libsoup3-doc | 3.6.5-3.el10_2.14 |
| AlmaLinux 8 | libsoup | 2.62.3-15.el8_10 |
| AlmaLinux 8 | libsoup-devel | 2.62.3-15.el8_10 |
| AlmaLinux 9 | libsoup | 2.72.0-16.el9_8.3 |
| AlmaLinux 9 | libsoup-devel | 2.72.0-16.el9_8.3 |
| Debian 12 | libsoup2.4 | no fix |
| Debian 12 | libsoup3 | no fix |
| Debian 13 | libsoup2.4 | no fix |
| Debian 13 | libsoup3 | no fix |
| Debian 14 | libsoup3 | 3.8.0-1 |
| Red Hat Enterprise Linux 10.2 | libsoup3 | 0:3.6.5-3.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libsoup3-debuginfo | 0:3.6.5-3.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libsoup3-debugsource | 0:3.6.5-3.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libsoup3-devel | 0:3.6.5-3.el10_2.14 |
| Red Hat Enterprise Linux 10.2 | libsoup3-doc | 0:3.6.5-3.el10_2.14 |
| Red Hat Enterprise Linux 8 | libsoup | 0:2.62.3-15.el8_10 |
| Red Hat Enterprise Linux 8 | libsoup-debuginfo | 0:2.62.3-15.el8_10 |
| Red Hat Enterprise Linux 8 | libsoup-debugsource | 0:2.62.3-15.el8_10 |
| Red Hat Enterprise Linux 8 | libsoup-devel | 0:2.62.3-15.el8_10 |
| Red Hat Enterprise Linux 9 | libsoup | 0:2.72.0-16.el9_8.3 |
| Red Hat Enterprise Linux 9 | libsoup-debuginfo | 0:2.72.0-16.el9_8.3 |
| Red Hat Enterprise Linux 9 | libsoup-debugsource | 0:2.72.0-16.el9_8.3 |
| Red Hat Enterprise Linux 9 | libsoup-devel | 0:2.72.0-16.el9_8.3 |
| Red Hat Enterprise Linux eus 10.0 | libsoup3 | 0:3.6.5-3.el10_0.17 |
| Red Hat Enterprise Linux eus 10.0 | libsoup3-debuginfo | 0:3.6.5-3.el10_0.17 |
| Red Hat Enterprise Linux eus 10.0 | libsoup3-debugsource | 0:3.6.5-3.el10_0.17 |
| Red Hat Enterprise Linux eus 10.0 | libsoup3-devel | 0:3.6.5-3.el10_0.17 |
| Red Hat Enterprise Linux eus 10.0 | libsoup3-doc | 0:3.6.5-3.el10_0.17 |
| Red Hat rhel aus 8.4 | libsoup | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel aus 8.4 | libsoup-debuginfo | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel aus 8.4 | libsoup-debugsource | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel aus 8.4 | libsoup-devel | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel aus 8.6 | libsoup | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel aus 8.6 | libsoup-debuginfo | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel aus 8.6 | libsoup-debugsource | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel aus 8.6 | libsoup-devel | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel e4s 8.8 | libsoup | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel e4s 8.8 | libsoup-debuginfo | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel e4s 8.8 | libsoup-debugsource | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel e4s 8.8 | libsoup-devel | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel e4s 9.2 | libsoup | 0:2.72.0-8.el9_2.13 |
| Red Hat rhel e4s 9.2 | libsoup-debuginfo | 0:2.72.0-8.el9_2.13 |
| Red Hat rhel e4s 9.2 | libsoup-debugsource | 0:2.72.0-8.el9_2.13 |
| Red Hat rhel e4s 9.2 | libsoup-devel | 0:2.72.0-8.el9_2.13 |
| Red Hat rhel e4s 9.4 | libsoup | 0:2.72.0-8.el9_4.12 |
| Red Hat rhel e4s 9.4 | libsoup-debuginfo | 0:2.72.0-8.el9_4.12 |
| Red Hat rhel e4s 9.4 | libsoup-debugsource | 0:2.72.0-8.el9_4.12 |
| Red Hat rhel e4s 9.4 | libsoup-devel | 0:2.72.0-8.el9_4.12 |
| Red Hat rhel eus 9.6 | libsoup | 0:2.72.0-10.el9_6.9 |
| Red Hat rhel eus 9.6 | libsoup-debuginfo | 0:2.72.0-10.el9_6.9 |
| Red Hat rhel eus 9.6 | libsoup-debugsource | 0:2.72.0-10.el9_6.9 |
| Red Hat rhel eus 9.6 | libsoup-devel | 0:2.72.0-10.el9_6.9 |
| Red Hat rhel eus long life 8.4 | libsoup | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel eus long life 8.4 | libsoup-debuginfo | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel eus long life 8.4 | libsoup-debugsource | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel eus long life 8.4 | libsoup-devel | 0:2.62.3-2.el8_4.10 |
| Red Hat rhel eus long life 8.6 | libsoup | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel eus long life 8.6 | libsoup-debuginfo | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel eus long life 8.6 | libsoup-debugsource | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel eus long life 8.6 | libsoup-devel | 0:2.62.3-2.el8_6.10 |
| Red Hat rhel tus 8.8 | libsoup | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel tus 8.8 | libsoup-debuginfo | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel tus 8.8 | libsoup-debugsource | 0:2.62.3-3.el8_8.11 |
| Red Hat rhel tus 8.8 | libsoup-devel | 0:2.62.3-3.el8_8.11 |
| Rocky Linux 8 | libsoup | 0:2.62.3-15.el8_10 |
| Rocky Linux 9 | libsoup | 0:2.72.0-16.el9_8.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Micro 5.3 | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Micro 5.4 | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Micro 5.5 | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libsoup | 3.4.4-150600.3.56.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libsoup2 | 2.74.3-150600.4.42.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | libsoup | 2.62.2-5.49.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libsoup | 3.4.4-150600.3.56.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libsoup2 | 2.74.3-150600.4.42.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | libsoup | 2.62.2-5.49.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libsoup | 3.0.4-150400.3.52.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libsoup2 | 2.74.3-150400.3.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libsoup | 3.4.4-150600.3.56.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libsoup2 | 2.74.3-150600.4.42.1 |
| Ubuntu 22.04 LTS | libsoup2.4 | no fix |
| Ubuntu 24.04 LTS | libsoup2.4 | no fix |
| Ubuntu 24.04 LTS | libsoup3 | no fix |
| Ubuntu 26.04 LTS | libsoup3 | no fix |
| Ubuntu 26.10 | libsoup2.4 | no fix |
| Ubuntu 26.10 | libsoup3 | no fix |
| Ubuntu Pro 16.04 LTS | libsoup2.4 | no fix |
| Ubuntu Pro 18.04 LTS | libsoup2.4 | no fix |
| Ubuntu Pro 20.04 LTS | libsoup2.4 | no fix |
| Ubuntu Pro 22.04 LTS | libsoup3 | no fix |
| Ubuntu Pro 26.04 LTS | libsoup2.4 | no fix |
| openSUSE Tumbleweed | libsoup2 | 2.74.3-24.1 |