net: xfrm: reject unrepresentable espintcp transport headers

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No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

In the Linux kernel, the following vulnerability has been resolved: net: xfrm: reject unrepresentable espintcp transport headers ESP-in-TCP can hand xfrm packets whose transport header offset no longer fits after the stream parser trims the TCP envelope. The plain transport header reset truncates that offset and triggers the skb warning path. Use the careful transport-header helper and drop the skb through the existing XFRM error path when the offset cannot be represented.

Source published

14 Oct 2026 13:27:47 UTC

Source modified

19 Oct 2026 09:19:11 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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