{"id":"CVE-2026-31752","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbridge: br_nd_send: validate ND option lengths\n\nbr_nd_send() walks ND options according to option-provided lengths.\nA malformed option can make the parser advance beyon…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbridge: br_nd_send: validate ND option lengths\n\nbr_nd_send() walks ND options according to option-provided lengths.\nA malformed option can make the parser advance beyon…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.15, < 5.10.253","linux_kernel >= 5.11, < 5.15.203","linux_kernel >= 5.16, < 6.1.168","linux_kernel >= 6.2, < 6.6.134","linux_kernel >= 6.7, < 6.12.81","linux_kernel >= 6.13, < 6.18.22","linux_kernel >= 6.19, < 6.19.12","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.12"],"published":"2026-05-01","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:19:20.170","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-31752","references":[{"url":"https://git.kernel.org/stable/c/259466f76f5a2148aff11134e68f4b4c6d52725b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/82a42eceec7c6bdb0e0da94c0542a173b7ea57f2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/837392a38445729c22e03d3abcf33f07763efd85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/850837965af15707fd3142c1cf3c5bfaf022299b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c49b9256bbacb6a135654aebd12e4c0e87166b7c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e0bfd6d4dc77ab345b6c65eef0cfe9b2f69085aa","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e71303a9190496136e240c4f2872b7b0b16027a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ee02d8991fd7bd86ed6ebd0deb4aab53feb0e43a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00129,"epssPercentile":0.025,"ingestedAt":"2026-09-08T15:33:26.989Z","slug":"CVE-2026-31752","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbridge: br_nd_send: validate ND option lengths\n\nbr_nd_send() walks ND options according to option-provided lengths.\nA malformed option can make the parser advance beyond the computed\noption span or use a too-short source LLADDR option payload.\n\nValidate option lengths against the remaining NS option area before\nadvancing, and only read source LLADDR when the option is large enough\nfor an Ethernet address.\n\n## Affected\n\n- `linux_kernel >= 4.15, < 5.10.253`\n- `linux_kernel >= 5.11, < 5.15.203`\n- `linux_kernel >= 5.16, < 6.1.168`\n- `linux_kernel >= 6.2, < 6.6.134`\n- `linux_kernel >= 6.7, < 6.12.81`\n- `linux_kernel >= 6.13, < 6.18.22`\n- `linux_kernel >= 6.19, < 6.19.12`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.12`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221749,"id":"CVE-2026-31752","ts":1792035355587,"field":"cvss","old":null,"new":"5.5"},{"seq":221748,"id":"CVE-2026-31752","ts":1792035355587,"field":"severity","old":"none","new":"medium"}]}