CVE-2025-40173
Published: Nov 12, 2025
Modified: May 11, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: net/ip6_tunnel: Prevent perpetual tunnel growth Similarly to ipv4 tunnel, ipv6 version updates dev->needed_headroom, too. While ipv4 tunnel headroom adjustment growth was limited in commit 5ae1e9922bbd ("net: ip_tunnel: prevent perpetual headroom growth"), ipv6 tunnel yet increases the headroom without any ceiling. Reflect ipv4 tunnel headroom adjustment limit on ipv6 version. Credits to Francesco Ruggeri, who was originally debugging this issue and wrote local Arista-specific patch and a reproducer.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 8eb30be0352d09165e94a41fef1c7b994dca0714 - < 566f8d5c8a443f2dd69c5460fdec43ed1c870c65affected 8eb30be0352d09165e94a41fef1c7b994dca0714 - < 11f6066af3bfb8149aa16c42c0b0c5ea5b199a94affected 8eb30be0352d09165e94a41fef1c7b994dca0714 - < 402b6985e872b4cf394bbbf33b503947a326a6cbaffected 8eb30be0352d09165e94a41fef1c7b994dca0714 - < 10fe967efe73c610e526ff7460581610633dee9caffected 8eb30be0352d09165e94a41fef1c7b994dca0714 - < 48294a67863c9cfa367abb66bbf0ef6548ae124f+3 more versions |
Linux | Linux | affected 4.7unaffected 0 - < 4.7unaffected 5.4.301 - <= 5.4.*unaffected 5.10.246 - <= 5.10.*unaffected 5.15.196 - <= 5.15.*+5 more versions |
References
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