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).
References10
- access.redhat.com/errata/RHSA-2025:21657
- access.redhat.com/errata/RHSA-2025:8126
- access.redhat.com/errata/RHSA-2025:8128
- access.redhat.com/errata/RHSA-2025:8132
- access.redhat.com/errata/RHSA-2025:8139
- access.redhat.com/errata/RHSA-2025:8140
- access.redhat.com/errata/RHSA-2025:8252
- access.redhat.com/errata/RHSA-2025:8480
- access.redhat.com/errata/RHSA-2025:8481
- access.redhat.com/errata/RHSA-2025:8482
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 65 · as of 7 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.