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).
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Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-04-03. NVD baseline CVSS 7.5; sources differ by 0.0.
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).
April 3, 2025
April 15, 2026
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | libsoup-0:2.62.2-9.el7_9 | 2025-11-18 | redhat |
| redhat | libsoup-0:2.62.2-6.el7_9 | 2025-06-17 | redhat |
| redhat | libsoup-0:2.62.3-2.el8_4.5 | 2025-06-09 | redhat |
| redhat | libsoup-0:2.62.3-1.el8_2.5 | 2025-06-04 | redhat |
| redhat | libsoup-0:2.72.0-8.el9_0.5 | 2025-06-04 | redhat |
| redhat | libsoup-0:2.62.3-2.el8_6.5 | 2025-06-04 | redhat |
| redhat | libsoup-0:2.62.3-3.el8_8.5 | 2025-05-28 | redhat |
| redhat | libsoup-0:2.72.0-8.el9_4.5 | 2025-05-26 | redhat |
| redhat | libsoup-0:2.72.0-10.el9_6.2 | 2025-05-26 | redhat |
| redhat | libsoup3-0:3.6.5-3.el10_0.6 | 2025-05-26 | redhat |
| redhat | libsoup-0:2.72.0-8.el9_2.5 | 2025-05-26 | redhat |
| redhat | libsoup-0:2.62.3-9.el8_10 | 2025-05-26 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Libsoup: denial of service attack to websocket server
RHSA-2025:21657 — Moderate
RHSA-2025:8126 — Moderate
RHSA-2025:8128 — Moderate
RHSA-2025:8132 — Moderate
RHSA-2025:8139 — Moderate
RHSA-2025:8140 — Moderate
RHSA-2025:8252 — Moderate
RHSA-2025:8480 — Moderate
RHSA-2025:8481 — Moderate
RHSA-2025:8482 — Moderate
RHSA-2025:8663 — Moderate
RHSA-2025:9179 — Moderate
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msrc · redhat