CVE-2026-73455
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Arista Networks | EOS | 1.0.0 < 4.33.0F | affected |
| Arista Networks | EOS | 4.33.0F <= 4.33.8M | affected |
| Arista Networks | EOS | 4.34.0F <= 4.34.6M | affected |
| Arista Networks | EOS | 4.35.0F <= 4.35.4M | affected |
| Arista Networks | EOS | 4.36.0F <= 4.36.0.1F | affected |
Weaknesses
- CWE-130: CWE-130 Improper Handling of Length Parameter Inconsistency
Workarounds
Configure OSPFv3 IPsec encryption to authenticate/encrypt OSPFv3 packets.
Per-interface encryption:
switch(config)# interface <interface-name> switch(config-if)# ospfv3 encryption ipsec spi <spi-value> esp aes-256-cbc sha1 passphrase <shared-passphrase>
Per-area encryption:
switch(config)# router ospfv3 switch(config-router-ospfv3)# address-family ipv4 switch(config-router-ospfv3-af)# area <area-id> encryption ipsec spi <spi-value> esp aes-256-cbc sha1 passphrase <shared-passphrase>
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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