{"id":"CVE-2026-98288","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: fix TSO header length truncation\n\nstmmac_tso_xmit() stores the protocol header length returned by\nstmmac_tso_header_size() in a u8","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: fix TSO header length truncation\n\nstmmac_tso_xmit() stores the protocol header length returned by\nstmmac_tso_header_size() in a u8. stmmac_tso_valid_packet…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9edfa7dab8112a012b349b7937f5444fdc21e8f9 < bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b","Linux >= 9edfa7dab8112a012b349b7937f5444fdc21e8f9 < 15989abd74f16f44bf953d056b95f1d2fda9b0cd","Linux 4.13"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:19.030","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98288","references":[{"url":"https://git.kernel.org/stable/c/15989abd74f16f44bf953d056b95f1d2fda9b0cd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bcf6013c2b4d732c6e4bf4d0f6ae4a18d63d414b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.418Z","slug":"CVE-2026-98288","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: fix TSO header length truncation\n\nstmmac_tso_xmit() stores the protocol header length returned by\nstmmac_tso_header_size() in a u8. stmmac_tso_valid_packet() admits\nheaders up to 1023 bytes, so a header longer than 255 bytes wraps modulo\n256 (486 becomes 230, 256 becomes 0).\n\nA TCP over IPv6 socket carrying a few hundred bytes of sticky\ndestination/hop-by-hop options makes skb_tcp_all_headers() exceed 255\nwhile staying below the 1023-byte limit, so such an skb reaches\nstmmac_tso_xmit().\n\nWiden proto_hdr_len to unsigned int, which is sufficient since the value\nis bounded by the hardware limit, and adjust the debug print specifier\naccordingly.\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":[]}