{"id":"CVE-2025-38512","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: prevent A-MSDU attacks in mesh networks\n\nThis patch is a mitigation to prevent the A-MSDU spoofing vulnerability\nfor mesh networks","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: prevent A-MSDU attacks in mesh networks\n\nThis patch is a mitigation to prevent the A-MSDU spoofing vulnerability\nfor mesh networks. The initial update to the IEEE…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.1.107, < 6.1.146","linux_kernel >= 6.3, < 6.6.99","linux_kernel >= 6.7, < 6.12.39","linux_kernel >= 6.13, < 6.15.7","linux_kernel = 6.16","debian_linux = 11.0"],"patched":["linux_kernel 6.15.7"],"published":"2025-08-16","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:18:43.873","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-38512","references":[{"url":"https://git.kernel.org/stable/c/6e3b09402cc6c3e3474fa548e8adf6897dda05de","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/737bb912ebbe4571195c56eba557c4d7315b26fb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e01851f6e9a665a6011b14714b271d3e6b0b8d32","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2c8a3c0388aef6bfc4aabfba07bc7dff16eea80","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec6392061de6681148b63ee6c8744da833498cdd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.00236,"epssPercentile":0.14505,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:51:13.174409Z"},"ingestedAt":"2026-10-15T22:48:25.510Z","slug":"CVE-2025-38512","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: prevent A-MSDU attacks in mesh networks\n\nThis patch is a mitigation to prevent the A-MSDU spoofing vulnerability\nfor mesh networks. The initial update to the IEEE 802.11 standard, in\nresponse to the FragAttacks, missed this case (CVE-2025-27558). It can\nbe considered a variant of CVE-2020-24588 but for mesh networks.\n\nThis patch tries to detect if a standard MSDU was turned into an A-MSDU\nby an adversary. This is done by parsing a received A-MSDU as a standard\nMSDU, calculating the length of the Mesh Control header, and seeing if\nthe 6 bytes after this header equal the start of an rfc1042 header. If\nequal, this is a strong indication of an ongoing attack attempt.\n\nThis defense was tested with mac80211_hwsim against a mesh network that\nuses an empty Mesh Address Extension field, i.e., when four addresses\nare used, and when using a 12-byte Mesh Address Extension field, i.e.,\nwhen six addresses are used. Functionality of normal MSDUs and A-MSDUs\nwas also tested, and confirmed working, when using both an empty and\n12-byte Mesh Address Extension field.\n\nIt was also tested with mac80211_hwsim that A-MSDU attacks in non-mesh\nnetworks keep being detected and prevented.\n\nNote that the vulnerability being patched, and the defense being\nimplemented, was also discussed in the following paper and in the\nfollowing IEEE 802.11 presentation:\n\nhttps://papers.mathyvanhoef.com/wisec2025.pdf\nhttps://mentor.ieee.org/802.11/dcn/25/11-25-0949-00-000m-a-msdu-mesh-spoof-protection.docx\n\n## Affected\n\n- `linux_kernel >= 6.1.107, < 6.1.146`\n- `linux_kernel >= 6.3, < 6.6.99`\n- `linux_kernel >= 6.7, < 6.12.39`\n- `linux_kernel >= 6.13, < 6.15.7`\n- `linux_kernel = 6.16`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.15.7`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}