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RHSA-2026:67872

Vulnerability from csaf_opensuse - Published: 2026-09-16 00:00 - Updated: 2026-09-17 08:54
Summary
security update for corosync
Severity
Important
Notes
Title of the patch: security update for corosync
Description of the patch: This security update provides a functional equivalent of RHSA-2026:67872. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:67872.
Patchnames: RHSA-2026:67872
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-81665
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Liberty Linux 10:corosync-3.1.10-1.el10_2.2.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 10:corosync-vqsim-3.1.10-1.el10_2.2.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 10:corosynclib-3.1.10-1.el10_2.2.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 10:corosynclib-devel-3.1.10-1.el10_2.2.x86_64 —
Vendor Fix
Threats
Impact important
References
To clipboard 

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    "distribution": {
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      },
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        "category": "legal_disclaimer",
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  "product_tree": {
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-81665",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-81665"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A heap-based buffer overflow was found in Corosync\u0027s 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.",
          "title": "CVE description"
        }
      ],
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        },
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          "url": "https://bugzilla.suse.com/1278738"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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            "version": "3.1"
          },
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          ]
        }
      ],
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          "date": "2026-09-16T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-81665"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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