CVE-2026-5265
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BaseFortify

Publication date: 2026-04-24

Last updated on: 2026-06-01

Assigner: Red Hat, Inc.

Description
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.
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Meta Information
Published
2026-04-24
Last Modified
2026-06-01
Generated
2026-06-16
EPSS Evaluated
2026-06-15
NVD
CVE-2026-5265
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-130 The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.
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