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6.5 Medium

CVE-2026-5265 When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original…

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.

Affected products and versions

Product Affected versions Fixed in
Fast Datapath for RHEL 7 Versions not published
Fast Datapath for RHEL 8 Versions not published
Fast Datapath for RHEL 9 Versions not published
Fast Datapath for RHEL 10 Versions not published
Fast Datapath for Red Hat Enterprise Linux 8 Versions not published
Fast Datapath for Red Hat Enterprise Linux 9 Versions not published
Fast Datapath for Red Hat Enterprise Linux 10 Versions not published

References

Timeline

  1. Published
  2. Last modified

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