CVE-2026-5265

{"id": "CVE-2026-5265", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 2.2}]}, "published": "2026-04-24T13:16:21.770", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:11694", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11695", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11696", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11698", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11700", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11701", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11702", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22110", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:22111", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-5265", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453458", "source": "secalert@redhat.com"}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/20/2", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/20/4", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-130"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-06-01T04:16:23.460", "sourceIdentifier": "secalert@redhat.com"}