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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected products
- GNOME / libsoup3.7.3
- RedHat / enterprise_linux7.0 – 7.0
- RedHat / enterprise_linux8.0 – 8.0
- RedHat / enterprise_linux9.0 – 9.0
- RedHat / enterprise_linux10.0 – 10.0
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:83384
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:83618
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2026:84586
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-102559
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2543285
Updated 30m ago · 8 sources