CVE-2026-98417 is a vulnerability in Linux Kernel
Published on October 14, 2026
net: xfrm: reject unrepresentable espintcp transport headers
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.
Products Associated with CVE-2026-98417
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Affected Versions
Linux:- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below 6c29681207bc213188afa603dff2d55e7178a341 is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below 4a8243fd2e21980fa3fd10c0610e9155057cebd3 is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below b2b84e73e0386ad0b4f9b8d3afde343e761f5275 is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below 327b2a457dd7d5445f7395f371f3c65de79bd5ce is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below cce630c751279e974fa0bb574d80575e0cc7e8f3 is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below 206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d is affected.
- Version e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 and below 96f01b53c2d05e003b040892256de54a586e8529 is affected.
- Version 5.6 is affected.
- Before 5.6 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.112, <= 6.12.* is unaffected.
- Version 6.18.54, <= 6.18.* is unaffected.
- Version 7.2.8, <= 7.2.* is unaffected.
- Version 7.3-rc4, <= * is unaffected.