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OESA-2026-2046 (CVE-2026-35091)

Vulnerability from osv_openeuler – Published: 2026-04-25 11:11 – Updated: 2026-08-06 11:11 – Source website
VLAI
Summary
corosync security update
Details

This package contains the Corosync Cluster Engine Executive, several default APIs and libraries, default configuration files, and an init script.

Security Fix(es):

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.(CVE-2026-35091)

A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.(CVE-2026-35092)

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "corosync-3.1.8-8.oe2403.aarch64.rpm",
          "corosync-debuginfo-3.1.8-8.oe2403.aarch64.rpm",
          "corosync-debugsource-3.1.8-8.oe2403.aarch64.rpm",
          "corosync-vqsim-3.1.8-8.oe2403.aarch64.rpm",
          "corosynclib-3.1.8-8.oe2403.aarch64.rpm",
          "corosynclib-devel-3.1.8-8.oe2403.aarch64.rpm"
        ],
        "src": [
          "corosync-3.1.8-8.oe2403.src.rpm"
        ],
        "x86_64": [
          "corosync-3.1.8-8.oe2403.x86_64.rpm",
          "corosync-debuginfo-3.1.8-8.oe2403.x86_64.rpm",
          "corosync-debugsource-3.1.8-8.oe2403.x86_64.rpm",
          "corosync-vqsim-3.1.8-8.oe2403.x86_64.rpm",
          "corosynclib-3.1.8-8.oe2403.x86_64.rpm",
          "corosynclib-devel-3.1.8-8.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "corosync",
        "purl": "pkg:rpm/openEuler/corosync\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.8-8.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "This package contains the Corosync Cluster Engine Executive, several default APIs and libraries, default configuration files, and an init script.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.(CVE-2026-35091)\n\nA flaw was found in Corosync. An integer overflow vulnerability in Corosync\u0026apos;s join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode.(CVE-2026-35092)",
  "id": "OESA-2026-2046",
  "modified": "2026-08-06T11:11:02Z",
  "published": "2026-04-25T11:11:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2046"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35091"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35092"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "corosync security update",
  "upstream": [
    "CVE-2026-35091",
    "CVE-2026-35092"
  ]
}



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