GHSA-WHR7-6788-JG2P

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-06-01 06:30
VLAI
Details

When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-5265"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-130"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T13:16:21Z",
    "severity": "MODERATE"
  },
  "details": "When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header\u0027s self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.",
  "id": "GHSA-whr7-6788-jg2p",
  "modified": "2026-06-01T06:30:25Z",
  "published": "2026-04-24T15:32:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5265"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11694"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11695"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11696"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11698"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11700"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11701"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:11702"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:22110"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:22111"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-5265"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453458"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/20/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/20/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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