{"id":"CVE-2026-72441","summary":"ieee802154: fix kernel-infoleak in dgram_recvmsg()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: fix kernel-infoleak in dgram_recvmsg()\n\nKMSAN reported a kernel-infoleak in move_addr_to_user():\n\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user\ninclude/linux/instrumented.h:131 [inline]\nBUG: KMSAN: kernel-infoleak in _inline_copy_to_user\ninclude/linux/uaccess.h:205 [inline]\nBUG: KMSAN: kernel-infoleak in _copy_to_user+0xcc/0x120\nlib/usercopy.c:26\n instrument_copy_to_user include/linux/instrumented.h:131 [inline]\n _inline_copy_to_user include/linux/uaccess.h:205 [inline]\n _copy_to_user+0xcc/0x120 lib/usercopy.c:26\n copy_to_user include/linux/uaccess.h:236 [inline]\n move_addr_to_user+0x2e7/0x440 net/socket.c:302\n ____sys_recvmsg+0x232/0x610 net/socket.c:2925\n ...\n Uninit was stored to memory at:\n ieee802154_addr_to_sa include/net/ieee802154_netdev.h:369 [inline]\n dgram_recvmsg+0xa09/0xbe0 net/ieee802154/socket.c:739\n\nThe issue occurs because the `pan_id` field of `struct ieee802154_addr`\nis left uninitialized when the address mode is `IEEE802154_ADDR_NONE`.\nThe execution flow is as follows:\n\n1. `__ieee802154_rx_handle_packet()` declares a local `struct\nieee802154_hdr hdr` on the stack.\n2. `ieee802154_hdr_pull()` calls `ieee802154_hdr_get_addr()` to parse\nthe source and destination addresses into this structure.\n3. If the address mode is `IEEE802154_ADDR_NONE`,\n`ieee802154_hdr_get_addr()` previously only set the `mode` field,\nleaving the `pan_id` field containing uninitialized stack memory.\n4. This uninitialized `pan_id` is later copied into a `struct\nsockaddr_ieee802154` in `dgram_recvmsg()` via `ieee802154_addr_to_sa()`.\n5. Finally, `move_addr_to_user()` copies the socket address structure to\nuser space, leaking the uninitialized bytes.\n\nFix this by using `memset` to zero out the address structure in\n`ieee802154_hdr_get_addr()` when the mode is `IEEE802154_ADDR_NONE`.","modified":"2026-08-18T03:31:18.606680965Z","published":"2026-08-15T05:56:53.305Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72441.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a2ee1a038a16e286d084bc293a7522d010a59ec3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72441.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72441"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"94b4f6c21cf54029377a0645675a9d81b6cf890d"},{"fixed":"a2ee1a038a16e286d084bc293a7522d010a59ec3"},{"fixed":"09cfe665f2c5d7a8a5ed4d6b487434a011325368"},{"fixed":"c88e687e44cb9c7690f5039a5a5941dba1f6a204"},{"fixed":"71b5add66c51d6764325de5f2e300bbf4f39e7a6"},{"fixed":"fc8766467b53335220b4b594ba15bc8f8cee0c76"},{"fixed":"de3bd9809af7555611334cb6a071806744430ef7"},{"fixed":"f14802465f5956baafe5f4b4541eb626b06b41f1"},{"fixed":"4db86f8ab11b5a41bfc36680be837e6ac1375ec6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72441.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.15.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72441.json"}}],"schema_version":"1.9.0"}