{"id":"CVE-2026-98278","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE() from the dev_fill_forward_path() loop check\n\nipip_fill_forward_path() and ip6_tnl_fill_forward_path() look up the\nroute to the tunnel's remot…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE() from the dev_fill_forward_path() loop check\n\nipip_fill_forward_path() and ip6_tnl_fill_forward_path() look up the\nroute to the tunnel's remot…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= ab427db17885814069bae891834f20842f0ac3a4 < d8eb177632dacda28bc6130c2105afbf5b791eb0","Linux >= ab427db17885814069bae891834f20842f0ac3a4 < 150dba2c69e93302af24a0c868eebe4871e2e107","Linux 6.19"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:17.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98278","references":[{"url":"https://git.kernel.org/stable/c/150dba2c69e93302af24a0c868eebe4871e2e107","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d8eb177632dacda28bc6130c2105afbf5b791eb0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.422Z","slug":"CVE-2026-98278","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE() from the dev_fill_forward_path() loop check\n\nipip_fill_forward_path() and ip6_tnl_fill_forward_path() look up the\nroute to the tunnel's remote endpoint and set ctx->dev to its device,\nwhich is the tunnel itself when that route resolves back to the tunnel.\ndev_fill_forward_path() then makes no progress and trips\nWARN_ON_ONCE(last_dev == ctx->dev) as soon as a flowtable tries to\noffload a flow through the tunnel. That routing loop is a configuration\nany CAP_NET_ADMIN user can set up, and ip_tunnel_xmit() and\nip6_tnl_xmit() already treat it as a tx error, so remove the warning and\njust fail the walk, as commit 008e7a7c293b (\"net: remove WARN_ON_ONCE\nwhen accessing forward path array\") did for the path stack overflow.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}