Description (CNA)
A heap-based buffer overflow was found in Corosync's Totem Process Group (totempg) message reassembly. When processing fragmented multicast messages, the buffer used to reassemble fragments lacks a runtime bounds check in release builds. A network-adjacent attacker able to send crafted multicast protocol messages to the cluster could cause a heap buffer overflow with attacker-controlled data. This can crash the Corosync daemon, causing a denial of service to the entire cluster, and may potentially allow further exploitation given sufficient heap-corruption control.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:3.1.10-1.el10_2.2 before * |
| Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:3.1.9-1.el10_0.3 before * |
| Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support | unaffected 0:2.4.5-7.el7_9.4 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:3.1.8-1.el8_10.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:3.1.0-3.el8_4.3 before * |
| Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | unaffected 0:3.1.0-3.el8_4.3 before * |
| Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:3.1.5-2.el8_6.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | unaffected 0:3.1.5-2.el8_6.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:3.1.7-1.el8_8.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | unaffected 0:3.1.7-1.el8_8.2 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:3.1.10-1.el9_8.2 before * |
| Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | unaffected 0:3.1.7-1.el9_2.2 before * |
| Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | unaffected 0:3.1.8-1.el9_4.2 before * |
| Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:3.1.9-2.el9_6.2 before * |
| Red Hat / Red Hat OpenShift Container Platform 4 | affected |
| Red Hat / Red Hat OpenShift Container Platform 4 | unaffected |
CWE
CWE-122
References
- https://access.redhat.com/errata/RHSA-2026:67872
- https://access.redhat.com/errata/RHSA-2026:67873
- https://access.redhat.com/errata/RHSA-2026:67878
- https://access.redhat.com/errata/RHSA-2026:67879
- https://access.redhat.com/errata/RHSA-2026:67880
- https://access.redhat.com/errata/RHSA-2026:67881
- https://access.redhat.com/errata/RHSA-2026:68574
- https://access.redhat.com/errata/RHSA-2026:69277
- https://access.redhat.com/errata/RHSA-2026:69278
- https://access.redhat.com/errata/RHSA-2026:69279
- https://access.redhat.com/errata/RHSA-2026:69280
- https://access.redhat.com/security/cve/CVE-2026-81665
- https://bugzilla.redhat.com/show_bug.cgi?id=2524910
ADP enrichment
No English description supplied.
No references supplied.