A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
To mitigate this set a conservative max-total-incoming-message-size / incoming payload limits where the API allows, and do not accept WebSocket connections from untrusted peers.
References
History
Tue, 29 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash. | |
| Title | Libsoup: libsoup: heap buffer overflow during websocket message reassembly | |
| 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
|
Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-29T17:15:25.792Z
Reserved: 2026-09-29T13:19:12.882Z
Link: CVE-2026-102557
No data.
Status : Received
Published: 2026-09-29T17:17:06.600
Modified: 2026-09-29T18:17:08.233
Link: CVE-2026-102557
No data.
OpenCVE Enrichment
No data.
Weaknesses