{"id":"CVE-2026-72441","title":"ieee802154: fix kernel-infoleak in dgram_recvmsg()","summary":"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\ninc…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < a2ee1a038a16e286d084bc293a7522d010a59ec3","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 09cfe665f2c5d7a8a5ed4d6b487434a011325368","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < c88e687e44cb9c7690f5039a5a5941dba1f6a204","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 71b5add66c51d6764325de5f2e300bbf4f39e7a6","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < fc8766467b53335220b4b594ba15bc8f8cee0c76","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < de3bd9809af7555611334cb6a071806744430ef7","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < f14802465f5956baafe5f4b4541eb626b06b41f1","Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 4db86f8ab11b5a41bfc36680be837e6ac1375ec6","Linux 3.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:55:28.811122Z"},"published":"2026-08-15","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:05:42.677Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72441","references":[{"url":"https://git.kernel.org/stable/c/a2ee1a038a16e286d084bc293a7522d010a59ec3"},{"url":"https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368"},{"url":"https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204"},{"url":"https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6"},{"url":"https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76"},{"url":"https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7"},{"url":"https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1"},{"url":"https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6"}],"tags":["cve.org"],"epss":0.00236,"epssPercentile":0.14729,"ingestedAt":"2026-11-06T18:00:12.571Z","slug":"CVE-2026-72441","body":"## Overview\n\nIn 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`.\n\n## Affected\n\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < a2ee1a038a16e286d084bc293a7522d010a59ec3`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 09cfe665f2c5d7a8a5ed4d6b487434a011325368`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < c88e687e44cb9c7690f5039a5a5941dba1f6a204`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 71b5add66c51d6764325de5f2e300bbf4f39e7a6`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < fc8766467b53335220b4b594ba15bc8f8cee0c76`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < de3bd9809af7555611334cb6a071806744430ef7`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < f14802465f5956baafe5f4b4541eb626b06b41f1`\n- `Linux >= 94b4f6c21cf54029377a0645675a9d81b6cf890d < 4db86f8ab11b5a41bfc36680be837e6ac1375ec6`\n- `Linux 3.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}