{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-50162",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-50162"
  ],
  "published": "2024-11-07T09:34:57Z",
  "summary": "bpf: devmap: provide rxq after redirect",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: devmap: provide rxq after redirect\n\nrxq contains a pointer to the device from where\nthe redirect happened. Currently, the BPF program\nthat was executed after a redirect via BPF_MAP_TYPE_DEVMAP*\ndoes not have it set.\n\nThis is particularly bad since accessing ingress_ifindex, e.g.\n\nSEC(\"xdp\")\nint prog(struct xdp_md *pkt)\n{\n        return bpf_redirect_map(&dev_redirect_map, 0, 0);\n}\n\nSEC(\"xdp/devmap\")\nint prog_after_redirect(struct xdp_md *pkt)\n{\n        bpf_printk(\"ifindex %i\", pkt->ingress_ifindex);\n        return XDP_PASS;\n}\n\ndepends on access to rxq, so a NULL pointer gets dereferenced:\n\n<1>[  574.475170] BUG: kernel NULL pointer dereference, address: 0000000000000000\n<1>[  574.475188] #PF: supervisor read access in kernel mode\n<1>[  574.475194] #PF: error_code(0x0000) - not-present page\n<6>[  574.475199] PGD 0 P4D 0\n<4>[  574.475207] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI\n<4>[  574.475217] CPU: 4 UID: 0 PID: 217 Comm: kworker/4:1 Not tainted 6.11.0-rc5-reduced-00859-g780801200300 #23\n<4>[  574.475226] Hardware name: Intel(R) Client Systems NUC13ANHi7/NUC13ANBi7, BIOS ANRPL357.0026.2023.0314.1458 03/14/2023\n<4>[  574.475231] Workqueue: mld mld_ifc_work\n<4>[  574.475247] RIP: 0010:bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c\n<4>[  574.475257] Code: cc cc cc cc cc cc cc 80 00 00 00 cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 66 90 55 48 89 e5 f3 0f 1e fa 48 8b 57 20 <48> 8b 52 00 8b 92 e0 00 00 00 48 bf f8 a6 d5 c4 5d a0 ff ff be 0b\n<4>[  574.475263] RSP: 0018:ffffa62440280c98 EFLAGS: 00010206\n<4>[  574.475269] RAX: ffffa62440280cd8 RBX: 0000000000000001 RCX: 0000000000000000\n<4>[  574.475274] RDX: 0000000000000000 RSI: ffffa62440549048 RDI: ffffa62440280ce0\n<4>[  574.475278] RBP: ffffa62440280c98 R08: 0000000000000002 R09: 0000000000000001\n<4>[  574.475281] R10: ffffa05dc8b98000 R11: ffffa05f577fca40 R12: ffffa05dcab24000\n<4>[  574.475285] R13: ffffa62440280ce0 R14: ffffa62440549048 R15: ffffa62440549000\n<4>[  574.475289] FS:  0000000000000000(0000) GS:ffffa05f4f700000(0000) knlGS:0000000000000000\n<4>[  574.475294] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n<4>[  574.475298] CR2: 0000000000000000 CR3: 000000025522e000 CR4: 0000000000f50ef0\n<4>[  574.475303] PKRU: 55555554\n<4>[  574.475306] Call Trace:\n<4>[  574.475313]  <IRQ>\n<4>[  574.475318]  ? __die+0x23/0x70\n<4>[  574.475329]  ? page_fault_oops+0x180/0x4c0\n<4>[  574.475339]  ? skb_pp_cow_data+0x34c/0x490\n<4>[  574.475346]  ? kmem_cache_free+0x257/0x280\n<4>[  574.475357]  ? exc_page_fault+0x67/0x150\n<4>[  574.475368]  ? asm_exc_page_fault+0x26/0x30\n<4>[  574.475381]  ? bpf_prog_5e13354d9cf5018a_prog_after_redirect+0x17/0x3c\n<4>[  574.475386]  bq_xmit_all+0x158/0x420\n<4>[  574.475397]  __dev_flush+0x30/0x90\n<4>[  574.475407]  veth_poll+0x216/0x250 [veth]\n<4>[  574.475421]  __napi_poll+0x28/0x1c0\n<4>[  574.475430]  net_rx_action+0x32d/0x3a0\n<4>[  574.475441]  handle_softirqs+0xcb/0x2c0\n<4>[  574.475451]  do_softirq+0x40/0x60\n<4>[  574.475458]  </IRQ>\n<4>[  574.475461]  <TASK>\n<4>[  574.475464]  __local_bh_enable_ip+0x66/0x70\n<4>[  574.475471]  __dev_queue_xmit+0x268/0xe40\n<4>[  574.475480]  ? selinux_ip_postroute+0x213/0x420\n<4>[  574.475491]  ? alloc_skb_with_frags+0x4a/0x1d0\n<4>[  574.475502]  ip6_finish_output2+0x2be/0x640\n<4>[  574.475512]  ? nf_hook_slow+0x42/0xf0\n<4>[  574.475521]  ip6_finish_output+0x194/0x300\n<4>[  574.475529]  ? __pfx_ip6_finish_output+0x10/0x10\n<4>[  574.475538]  mld_sendpack+0x17c/0x240\n<4>[  574.475548]  mld_ifc_work+0x192/0x410\n<4>[  574.475557]  process_one_work+0x15d/0x380\n<4>[  574.475566]  worker_thread+0x29d/0x3a0\n<4>[  574.475573]  ? __pfx_worker_thread+0x10/0x10\n<4>[  574.475580]  ? __pfx_worker_thread+0x10/0x10\n<4>[  574.475587]  kthread+0xcd/0x100\n<4>[  574.475597]  ? __pfx_kthread+0x10/0x10\n<4>[  574.475606]  ret_from_fork+0x31/0x50\n<4>[  574.475615]  ? __pfx_kthread+0x10/0x10\n<4>[  574.475623]  ret_from_fork_asm+0x1a/0x\n---truncated---",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
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        "1:6.1.47-1+rpt2",
        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
        "1:6.6.31-1+rpt1",
        "1:6.6.47-1+rpt1",
        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3"
      ],
      "ecosystem_specific": {
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          },
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        ]
      },
      "database_specific": {
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            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.115"
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          "1:6.1.47-1+rpt2": {
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            "compiled_filter": false
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            "assessment": "commit ancestry (strak rule)",
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          },
          "1:6.1.63-1+rpt1": {
            "linux_commit": null,
            "upstream_version": "6.1.63",
            "assessment": "upstream version (no usable Linux commit)",
            "upstream_fixed": "6.1.115"
          },
          "1:6.1.73-1+rpt1": {
            "linux_commit": null,
            "upstream_version": "6.1.73",
            "assessment": "upstream version (no usable Linux commit)",
            "upstream_fixed": "6.1.115"
          },
          "1:6.6.20-1+rpt1": {
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            "upstream_version": "6.6.20",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          },
          "1:6.6.28-1+rpt1": {
            "linux_commit": "0c341f47adc3578cd5f817aa20ee2b7f9ae6b23e",
            "upstream_version": "6.6.28",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
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          "1:6.6.31-1+rpt1": {
            "linux_commit": "c1432b4bae5b6582f4d32ba381459f33c34d1424",
            "upstream_version": "6.6.31",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          },
          "1:6.6.47-1+rpt1": {
            "linux_commit": "cf64a1dfecc2dc418efdd61701c1a4b185ab4761",
            "upstream_version": "6.6.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          },
          "1:6.6.51-1+rpt1": {
            "linux_commit": "0094eba3f2a4338cfa6854b0b5104d02ba0fa01f",
            "upstream_version": "6.6.51",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          },
          "1:6.6.51-1+rpt2": {
            "linux_commit": "82a50e430ef1d6eb37d78e25aa572c1f6ea56160",
            "upstream_version": "6.6.51",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          },
          "1:6.6.51-1+rpt3": {
            "linux_commit": "5aeecea9f4a45248bcf564dec924965e066a7bfd",
            "upstream_version": "6.6.51",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.6.59"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-50162"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fe068afb868660fe683a8391c6c17ecbe2254922"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a778fbe087c19f4ece5f5fc14173328f070c3803"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/49454f09936a9a96edfb047156889879cb4001eb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9167d1c274a336e4763eeb3f3f9cb763c55df5aa"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ca9984c5f0ab3690d98b13937b2485a978c8dd73"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}