{"id":"CVE-2026-72049","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72049","summary":"ieee802154: admin-gate legacy LLSEC dump operations","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: admin-gate legacy LLSEC dump operations\n\nIn net/ieee802154/netlink.c, the legacy IEEE802154_NL family ops table\nbuilds the LLSEC dump entries (LLSEC_LIST_KEY, LLSEC_LIST_DEV,\nLLSEC_LIST_DEVKEY, LLSEC_LIST_SECLEVEL) with IEEE802154_DUMP() which\nsets no .flags, so generic netlink runs them ungated. The modern\nnl802154 family admin-gates the equivalent reads via\nNL802154_CMD_GET_SEC_KEY and friends with .flags = GENL_ADMIN_PERM.\n\nAny local uid that can open AF_NETLINK / NETLINK_GENERIC can resolve\nthe \"802.15.4 MAC\" family and dump LLSEC_LIST_KEY on any wpan netdev\nthat has an LLSEC key installed; the dump handler writes the raw\n16-byte AES-128 key bytes (IEEE802154_ATTR_LLSEC_KEY_BYTES, copied\nverbatim from struct ieee802154_llsec_key.key) into the reply.\nRecovering the AES key compromises 802.15.4 LLSEC link confidentiality\nand authenticity, since LLSEC uses CCM* and the same key authenticates\nand encrypts frames.\n\nImpact: any local uid with no capabilities can read the raw 16-byte\nAES-128 LLSEC key from the kernel keytable on any wpan netdev that has\nan administrator-installed LLSEC key, by issuing an LLSEC_LIST_KEY\ndump on the legacy IEEE802154_NL generic-netlink family.\n\nIntroduce IEEE802154_DUMP_PRIV() mirroring IEEE802154_DUMP() but\nsetting .flags = GENL_ADMIN_PERM, and use it for the four LLSEC dump\nentries. LIST_PHY and LIST_IFACE retain IEEE802154_DUMP() because the\nmodern nl802154 family exposes their equivalents to unprivileged\nreaders by design (NL802154_CMD_GET_WPAN_PHY and\nNL802154_CMD_GET_INTERFACE carry \"can be retrieved by unprivileged\nusers\" annotations).","published":"2026-08-15T05:52:06.989Z","modified":"2026-08-18T03:56:19.665725926Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.261"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09fd25cd8cd80a6b3edef04e53a7324d06ac2180"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1905ebabe638c946aced00c4bb664da26cac56d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3465035ba18b1ed50f8d201897d14135d20532b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5abe94a205539d27945cda3ba43fdcfe295cf2c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6383248058956f2a52d720b1e9f8921099cdae04"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c1e0b6d49471a712511d23fc9d06901561135e8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dffe745760f38fac0b8288e0dc4759b23d9888ff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e84708ef7521f3bffc85a449954042018abbd60e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72049.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72049"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:19.665725926Z"}}