{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56663",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56663"
  ],
  "published": "2024-12-27T15:08:24Z",
  "summary": "wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one\n\nSince the netlink attribute range validation provides inclusive\nchecking, the *max* of attribute NL80211_ATTR_MLO_LINK_ID should be\nIEEE80211_MLD_MAX_NUM_LINKS - 1 otherwise causing an off-by-one.\n\nOne crash stack for demonstration:\n==================================================================\nBUG: KASAN: wild-memory-access in ieee80211_tx_control_port+0x3b6/0xca0 net/mac80211/tx.c:5939\nRead of size 6 at addr 001102080000000c by task fuzzer.386/9508\n\nCPU: 1 PID: 9508 Comm: syz.1.386 Not tainted 6.1.70 #2\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x177/0x231 lib/dump_stack.c:106\n print_report+0xe0/0x750 mm/kasan/report.c:398\n kasan_report+0x139/0x170 mm/kasan/report.c:495\n kasan_check_range+0x287/0x290 mm/kasan/generic.c:189\n memcpy+0x25/0x60 mm/kasan/shadow.c:65\n ieee80211_tx_control_port+0x3b6/0xca0 net/mac80211/tx.c:5939\n rdev_tx_control_port net/wireless/rdev-ops.h:761 [inline]\n nl80211_tx_control_port+0x7b3/0xc40 net/wireless/nl80211.c:15453\n genl_family_rcv_msg_doit+0x22e/0x320 net/netlink/genetlink.c:756\n genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]\n genl_rcv_msg+0x539/0x740 net/netlink/genetlink.c:850\n netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2508\n genl_rcv+0x24/0x40 net/netlink/genetlink.c:861\n netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]\n netlink_unicast+0x74b/0x8c0 net/netlink/af_netlink.c:1352\n netlink_sendmsg+0x882/0xb90 net/netlink/af_netlink.c:1874\n sock_sendmsg_nosec net/socket.c:716 [inline]\n __sock_sendmsg net/socket.c:728 [inline]\n ____sys_sendmsg+0x5cc/0x8f0 net/socket.c:2499\n ___sys_sendmsg+0x21c/0x290 net/socket.c:2553\n __sys_sendmsg net/socket.c:2582 [inline]\n __do_sys_sendmsg net/socket.c:2591 [inline]\n __se_sys_sendmsg+0x19e/0x270 net/socket.c:2589\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x45/0x90 arch/x86/entry/common.c:81\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUpdate the policy to ensure correct validation.",
  "affected": [
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        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56663"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/29e640ae641b9f5ffc666049426d2b16c98d9963"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f3412522f78826fef1dfae40ef378a863df2591c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f850d1d9f1106f528dfc5807565f2d1fa9a397d3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2e3dbf938656986cce73ac4083500d0bcfbffe24"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}