Description
A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.
No analysis available yet.
Remediation
Vendor Workaround
To mitigate this enforce application-level limits on outgoing WebSocket message sizes. Do not send untrusted bulk data as a single WebSocket message.
Tracking
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Advisories
No advisories yet.
References
History
Tue, 29 Sep 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow. | |
| Title | Libsoup: libsoup: heap buffer overflow during websocket client-frame masking | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-125 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-29T17:15:34.470Z
Reserved: 2026-09-29T13:19:23.247Z
Link: CVE-2026-102559
No data.
Status : Awaiting Analysis
Published: 2026-09-29T18:17:08.503
Modified: 2026-09-29T21:29:07.663
Link: CVE-2026-102559
No data.
OpenCVE Enrichment
No data.
Weaknesses
-
CWE-125
Out-of-bounds Read