{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56659",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56659"
  ],
  "published": "2024-12-27T15:08:24Z",
  "summary": "net: lapb: increase LAPB_HEADER_LEN",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lapb: increase LAPB_HEADER_LEN\n\nIt is unclear if net/lapb code is supposed to be ready for 8021q.\n\nWe can at least avoid crashes like the following :\n\nskbuff: skb_under_panic: text:ffffffff8aabe1f6 len:24 put:20 head:ffff88802824a400 data:ffff88802824a3fe tail:0x16 end:0x140 dev:nr0.2\n------------[ cut here ]------------\n kernel BUG at net/core/skbuff.c:206 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 1 UID: 0 PID: 5508 Comm: dhcpcd Not tainted 6.12.0-rc7-syzkaller-00144-g66418447d27b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024\n RIP: 0010:skb_panic net/core/skbuff.c:206 [inline]\n RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216\nCode: 0d 8d 48 c7 c6 2e 9e 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 1a 6f 37 02 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3\nRSP: 0018:ffffc90002ddf638 EFLAGS: 00010282\nRAX: 0000000000000086 RBX: dffffc0000000000 RCX: 7a24750e538ff600\nRDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000000\nRBP: ffff888034a86650 R08: ffffffff8174b13c R09: 1ffff920005bbe60\nR10: dffffc0000000000 R11: fffff520005bbe61 R12: 0000000000000140\nR13: ffff88802824a400 R14: ffff88802824a3fe R15: 0000000000000016\nFS:  00007f2a5990d740(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000110c2631fd CR3: 0000000029504000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  skb_push+0xe5/0x100 net/core/skbuff.c:2636\n  nr_header+0x36/0x320 net/netrom/nr_dev.c:69\n  dev_hard_header include/linux/netdevice.h:3148 [inline]\n  vlan_dev_hard_header+0x359/0x480 net/8021q/vlan_dev.c:83\n  dev_hard_header include/linux/netdevice.h:3148 [inline]\n  lapbeth_data_transmit+0x1f6/0x2a0 drivers/net/wan/lapbether.c:257\n  lapb_data_transmit+0x91/0xb0 net/lapb/lapb_iface.c:447\n  lapb_transmit_buffer+0x168/0x1f0 net/lapb/lapb_out.c:149\n lapb_establish_data_link+0x84/0xd0\n lapb_device_event+0x4e0/0x670\n  notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93\n __dev_notify_flags+0x207/0x400\n  dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922\n  devinet_ioctl+0xa4e/0x1aa0 net/ipv4/devinet.c:1188\n  inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1003\n  sock_do_ioctl+0x158/0x460 net/socket.c:1227\n  sock_ioctl+0x626/0x8e0 net/socket.c:1346\n  vfs_ioctl fs/ioctl.c:51 [inline]\n  __do_sys_ioctl fs/ioctl.c:907 [inline]\n  __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.121",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56659"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3aa2ef7ffd0451e8f81c249d2a2a68283c6bc700"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/76d856f03d0290cf5392364ecdf74c15ee16b8fd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c21c7c1c00bcc60cf752ec491bdfd47693f4d3c7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f0949199651bc87c5ed2c12a7323f441f1af6fe9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/03e661b5e7aa1124f24054df9ab2ee5cb2178973"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2b351355bbd50ae25d096785b6eb31998d2bf765"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a6d75ecee2bf828ac6a1b52724aba0a977e4eaf4"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}