{"id":"CVE-2026-72003","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-72003","generatedAt":"2026-10-28T02:13:12.184Z","title":"In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: cyw: fix heap overflow on a short auth frame brcmf_notify_auth_frame_rx() takes the frame length from the firmware event and copies the frame body with the management…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: cyw: fix heap overflow on a short auth frame\n\nbrcmf_notify_auth_frame_rx() takes the frame length from the firmware\nevent and copies the frame body with the management header offset\nsubtracted:\n\n\tu32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);\n\t...\n\tmemcpy(&mgmt_frame->u, frame,\n\t       mgmt_frame_len - offsetof(struct ieee80211_mgmt, u));\n\nThe only length check is e->datalen >= sizeof(*rxframe), so mgmt_frame_len\ncan be anything from 0 up. offsetof(struct ieee80211_mgmt, u) is 24. When\nmgmt_frame_len is below that, the subtraction wraps as an unsigned value to\na huge length. The memcpy then runs far past the kzalloc'd buffer. A\nmalicious or malfunctioning AP can make the frame short during the\nexternal SAE auth exchange, so this is a remotely triggered heap overflow.\n\nReject frames shorter than the management header offset before the copy.","published":"2026-08-15T06:20:54.000Z","lastModified":"2026-10-19T22:17:21.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-191"],"affected":[],"epss":{"score":0.0035,"percentile":0.28391,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/185bb156c427d0f865d344a6d0eaa02c6d05cc57","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/240c8d2c717b3f8153e7e877b22a82518d78dbdc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/55b26abb1fa1ec406b3ad11b43c49c7624257565","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72003","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}