{"id":"CVE-2026-74585","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\n\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.m…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\n\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.m…","severity":"none","published":"2026-08-22","updated":"2026-08-22","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74585","references":[{"url":"https://git.kernel.org/stable/c/3d3c212b70633332ab71672aa2bc6af257d2ec83","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/40d2ffb74094cf36edbe05855566a4c58b6ce808","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/50f0c8dd8c3390f851cfb97ca13116f9ee6469d1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6c892ed9f4129ae40ef0f92e1bb31aa0b0ddc72c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b98e1e28bd95b0fa33164eec1e763d26c7058b39","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6764992f17b23d91ff93ce905ab53c2aa7191f0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f28066057134aa9294caa597b670daf505ad9dce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f32c3a9a77cfb50934a60b05d5407649af062535","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"ingestedAt":"2026-08-23T06:43:33.517Z","epss":0.00177,"epssPercentile":0.07467,"slug":"CVE-2026-74585","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Bound the DROM dual link port number before indexing sw->ports\n\ntb_drom_parse_entry_port() validates the device-supplied header->index\nagainst sw->config.max_port_number before indexing sw->ports[], but the\nsibling field entry->dual_link_port_nr -- a 6-bit value also read from\nthe DROM -- indexes the same array with no such check. A malicious or\nmalformed Thunderbolt device can set dual_link_port_nr beyond the\nallocated sw->ports[] (max_port_number + 1 entries), producing an\nout-of-bounds tb_port pointer that is stored and later dereferenced.\n\nReject a port entry whose dual_link_port_nr exceeds max_port_number,\nthe same bound already applied to header->index.\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":[]}