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GHSA-RHQF-XFXJ-8VG6

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72441"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:17Z",
    "severity": null
  },
  "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`.",
  "id": "GHSA-rhqf-xfxj-8vg6",
  "modified": "2026-08-15T06:32:24Z",
  "published": "2026-08-15T06:32:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72441"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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