high8.6
CVE-2026-102556
Libsoup: libsoup: heap buffer overflow from websocket pong signal type confusion
Impact
A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnome | Libsoup | before 3.7.3 |
| Redhat | Enterprise Linux | Versions 7.0, 8.0, 9.0, 10.0 |
| Red Hat | Red Hat Enterprise Linux 10 | All versions Version patch: 0:3.6.5-3.el10_2.20 |
| Red Hat | Red Hat Enterprise Linux 8 | All versions Version patch: 0:2.62.3-19.el8_10 |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | All versions Version patch: 0:2.62.3-2.el8_4.14 |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | All versions Version patch: 0:2.62.3-2.el8_4.14 |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | All versions Version patch: 0:2.62.3-3.el8_8.15 |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions | All versions Version patch: 0:2.62.3-3.el8_8.15 |
| Red Hat | Red Hat Enterprise Linux 9 | All versions Version patch: 0:2.72.0-16.el9_8.8 |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions | All versions Version patch: 0:2.72.0-8.el9_2.18 |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions | All versions Version patch: 0:2.72.0-8.el9_4.17 |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | All versions Version patch: 0:2.62.2-16.el7_9 |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | All versions Version patch: 0:2.72.0-10.el9_6.14 |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | All versions Version patch: 0:3.6.5-3.el10_0.19 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://access.redhat.com/errata/RHSA-2026:83384
- https://access.redhat.com/errata/RHSA-2026:83618
- https://access.redhat.com/errata/RHSA-2026:84586
- https://access.redhat.com/errata/RHSA-2026:92347
- https://access.redhat.com/security/cve/CVE-2026-102556
- https://bugzilla.redhat.com/show_bug.cgi?id=2543229
- https://github.com/advisories/GHSA-q4x2-vf8m-46j5
- https://nvd.nist.gov/vuln/detail/CVE-2026-102556
- https://access.redhat.com/errata/RHSA-2026:93445
- https://access.redhat.com/errata/RHSA-2026:93447
- https://access.redhat.com/errata/RHSA-2026:93466
- https://access.redhat.com/errata/RHSA-2026:93446
- https://access.redhat.com/errata/RHSA-2026:93465
- https://access.redhat.com/errata/RHSA-2026:93583