6.5Mittel
CVE-2026-5265Ovn: ovn: heap over-read in icmp error response generation
Beschreibung
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.
Schwachstellentyp (CWE):
CWE-130
Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.
Betroffene Produkte und Versionen
| Hersteller | Produkt | Versionen | |
|---|---|---|---|
| enterprise linux | 10 | — | |
| enterprise linux | 7 | — | |
| enterprise linux | 8 | — | |
| enterprise linux | 9 | — | |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 10 | all versions | |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 8 | all versions | |
| Red Hat | Fast Datapath for Red Hat Enterprise Linux 9 | all versions | |
| Red Hat | Fast Datapath for RHEL 7 | all versions | |
| Red Hat | Fast Datapath for RHEL 8 | all versions | |
| Red Hat | Fast Datapath for RHEL 9 | all versions |
Referenzen und Patches
- RHSA-2026:11694 vendor-advisory
- RHSA-2026:11695 vendor-advisory
- RHSA-2026:11696 vendor-advisory
- RHSA-2026:11698 vendor-advisory
- RHSA-2026:11700 vendor-advisory
- RHSA-2026:11701 vendor-advisory
- RHSA-2026:11702 vendor-advisory
- RHSA-2026:22110 vendor-advisory
- RHSA-2026:22111 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-5265 vdb-entry
- RHBZ#2453458 issue-tracking
- http://www.openwall.com/lists/oss-security/2026/04/20/2
- http://www.openwall.com/lists/oss-security/2026/04/20/4