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THREAT OPS › Threat News › [NVD] CVE-2026-81665 (HIGH 7.5) — 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 c

[NVD] CVE-2026-81665 (HIGH 7.5) — 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 c

mednvdPublished 2026-09-04

CVE-2026-81665 CVSS: 7.5 HIGH Published: 2026-09-04T09:17:11.357

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 coul

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-81665