What’s Vulnerable › Vulnerabilities

CVE-2025-32049: Libsoup: denial of service attack to websocket server

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-03 · updated 2026-11-01
• Weakness: CWE-770

Description

A flaw was found in libsoup. The SoupWebsocketConnection may accept a large WebSocket message, which may cause libsoup to allocate memory and lead to a denial of service (DoS).

Affected products

• Libsoup: through 3.6.4
• Red Hat Enterprise Linux 10: all versions — fixed in 0:3.6.5-3.el10_0.6
• Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:2.62.2-9.el7_9
• Red Hat Enterprise Linux 8: all versions — fixed in 0:2.62.3-9.el8_10
• Red Hat Enterprise Linux 8.2 Advanced Update Support: all versions — fixed in 0:2.62.3-1.el8_2.5
• Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_4.5
• Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_6.5
• Red Hat Enterprise Linux 8.6 Telecommunications Update Service: all versions — fixed in 0:2.62.3-2.el8_6.5
• Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions: all versions — fixed in 0:2.62.3-2.el8_6.5
• Red Hat Enterprise Linux 8.8 Extended Update Support: all versions — fixed in 0:2.62.3-3.el8_8.5
• Red Hat Enterprise Linux 9: all versions — fixed in 0:2.72.0-10.el9_6.2
• Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions: all versions — fixed in 0:2.72.0-8.el9_0.5
• Red Hat Enterprise Linux 9.2 Extended Update Support: all versions — fixed in 0:2.72.0-8.el9_2.5
• Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:2.72.0-8.el9_4.5

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:3.6.5-3.el10_0.6; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-9.el7_9; Red Hat Enterprise Linux 8 0:2.62.3-9.el8_10; Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.5; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.5; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.5; Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.5; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.5; Red Hat Enterprise Linux 8.8 Extended Update Support 0:2.62.3-3.el8_8.5; Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.2; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.5; Red Hat Enterprise Linux 9.2 Extended Update Support 0:2.72.0-8.el9_2.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2025:21657
• https://access.redhat.com/errata/RHSA-2025:8126
• https://access.redhat.com/errata/RHSA-2025:8128
• https://access.redhat.com/errata/RHSA-2025:8132
• https://access.redhat.com/errata/RHSA-2025:8139
• https://access.redhat.com/errata/RHSA-2025:8140
• https://access.redhat.com/errata/RHSA-2025:8252
• https://access.redhat.com/errata/RHSA-2025:8480
• https://access.redhat.com/errata/RHSA-2025:8481
• https://access.redhat.com/errata/RHSA-2025:8482
• https://access.redhat.com/errata/RHSA-2025:8663
• https://access.redhat.com/security/cve/CVE-2025-32049

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