CVE-2026-98417
Published Oct 14, 2026
Description
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.
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References
Other References
https://git.kernel.org/stable/c/206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d
https://git.kernel.org/stable/c/327b2a457dd7d5445f7395f371f3c65de79bd5ce
https://git.kernel.org/stable/c/4a8243fd2e21980fa3fd10c0610e9155057cebd3
https://git.kernel.org/stable/c/6c29681207bc213188afa603dff2d55e7178a341
https://git.kernel.org/stable/c/96f01b53c2d05e003b040892256de54a586e8529
https://git.kernel.org/stable/c/b2b84e73e0386ad0b4f9b8d3afde343e761f5275
https://git.kernel.org/stable/c/cce630c751279e974fa0bb574d80575e0cc7e8f3
https://git.kernel.org/stable/c/d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b
Frequently Asked Questions
What is CVE-2026-98417? +
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.
How do I check if I'm vulnerable to CVE-2026-98417? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.