Description
In the Linux kernel, the following vulnerability has been resolved:
ieee802154: fix kernel-infoleak in dgram_recvmsg()
KMSAN reported a kernel-infoleak in move_addr_to_user():
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:131 [inline] BUG: KMSAN: kernel-infoleak in _inline_copy_to_user include/linux/uaccess.h:205 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xcc/0x120 lib/usercopy.c:26 instrument_copy_to_user include/linux/instrumented.h:131 [inline] _inline_copy_to_user include/linux/uaccess.h:205 [inline] _copy_to_user+0xcc/0x120 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:236 [inline] move_addr_to_user+0x2e7/0x440 net/socket.c:302 ____sys_recvmsg+0x232/0x610 net/socket.c:2925 ... Uninit was stored to memory at: ieee802154_addr_to_sa include/net/ieee802154_netdev.h:369 [inline] dgram_recvmsg+0xa09/0xbe0 net/ieee802154/socket.c:739
The issue occurs because the `pan_id` field of `struct ieee802154_addr` is left uninitialized when the address mode is `IEEE802154_ADDR_NONE`. The execution flow is as follows:
1. `__ieee802154_rx_handle_packet()` declares a local `struct ieee802154_hdr hdr` on the stack. 2. `ieee802154_hdr_pull()` calls `ieee802154_hdr_get_addr()` to parse the source and destination addresses into this structure. 3. If the address mode is `IEEE802154_ADDR_NONE`, `ieee802154_hdr_get_addr()` previously only set the `mode` field, leaving the `pan_id` field containing uninitialized stack memory. 4. This uninitialized `pan_id` is later copied into a `struct sockaddr_ieee802154` in `dgram_recvmsg()` via `ieee802154_addr_to_sa()`. 5. Finally, `move_addr_to_user()` copies the socket address structure to user space, leaking the uninitialized bytes.
Fix this by using `memset` to zero out the address structure in `ieee802154_hdr_get_addr()` when the mode is `IEEE802154_ADDR_NONE`.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < a2ee1a038a16e286d084bc293a7522d010a59ec3; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < 09cfe665f2c5d7a8a5ed4d6b487434a011325368; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < c88e687e44cb9c7690f5039a5a5941dba1f6a204; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < 71b5add66c51d6764325de5f2e300bbf4f39e7a6; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < fc8766467b53335220b4b594ba15bc8f8cee0c76; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < de3bd9809af7555611334cb6a071806744430ef7; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < f14802465f5956baafe5f4b4541eb626b06b41f1; >= 94b4f6c21cf54029377a0645675a9d81b6cf890d, < 4db86f8ab11b5a41bfc36680be837e6ac1375ec6 |
| Linux | Linux | 3.15 |
References
- https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368
- https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6
- https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6
- https://git.kernel.org/stable/c/a2ee1a038a16e286d084bc293a7522d010a59ec3
- https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204
- https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7
- https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1
- https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76
Timeline
- Published
- Aug 15, 2026
- Last modified
- Aug 17, 2026
- NVD status
- Received