CVE-2021-47106
Vulnerability from cvelistv5
Published
2024-03-04 18:15
Modified
2024-11-04 11:59
Severity ?
Summary
netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f7d9b31ce7abdbb29bf018131ac920c9f698518
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d558e5f0d6fdd0a568f73dceb0b40c4f5012e5a
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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                "id": "CVE-2021-47106",
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    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()\n\nWe need to use list_for_each_entry_safe() iterator\nbecause we can not access @catchall after kfree_rcu() call.\n\nsyzbot reported:\n\nBUG: KASAN: use-after-free in nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [inline]\nBUG: KASAN: use-after-free in nft_set_destroy net/netfilter/nf_tables_api.c:4504 [inline]\nBUG: KASAN: use-after-free in nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_api.c:4493\nRead of size 8 at addr ffff8880716e5b80 by task syz-executor.3/8871\n\nCPU: 1 PID: 8871 Comm: syz-executor.3 Not tainted 5.16.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0x8d/0x2ed mm/kasan/report.c:247\n __kasan_report mm/kasan/report.c:433 [inline]\n kasan_report.cold+0x83/0xdf mm/kasan/report.c:450\n nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [inline]\n nft_set_destroy net/netfilter/nf_tables_api.c:4504 [inline]\n nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_api.c:4493\n __nft_release_table+0x79f/0xcd0 net/netfilter/nf_tables_api.c:9626\n nft_rcv_nl_event+0x4f8/0x670 net/netfilter/nf_tables_api.c:9688\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:83\n blocking_notifier_call_chain kernel/notifier.c:318 [inline]\n blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:306\n netlink_release+0xcb6/0x1dd0 net/netlink/af_netlink.c:788\n __sock_release+0xcd/0x280 net/socket.c:649\n sock_close+0x18/0x20 net/socket.c:1314\n __fput+0x286/0x9f0 fs/file_table.c:280\n task_work_run+0xdd/0x1a0 kernel/task_work.c:164\n tracehook_notify_resume include/linux/tracehook.h:189 [inline]\n exit_to_user_mode_loop kernel/entry/common.c:175 [inline]\n exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207\n __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]\n syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300\n do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f75fbf28adb\nCode: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44\nRSP: 002b:00007ffd8da7ec10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003\nRAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f75fbf28adb\nRDX: 00007f75fc08e828 RSI: ffffffffffffffff RDI: 0000000000000003\nRBP: 00007f75fc08a960 R08: 0000000000000000 R09: 00007f75fc08e830\nR10: 00007ffd8da7ed10 R11: 0000000000000293 R12: 00000000002067c3\nR13: 00007ffd8da7ed10 R14: 00007f75fc088f60 R15: 0000000000000032\n \u003c/TASK\u003e\n\nAllocated by task 8886:\n kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38\n kasan_set_track mm/kasan/common.c:46 [inline]\n set_alloc_info mm/kasan/common.c:434 [inline]\n ____kasan_kmalloc mm/kasan/common.c:513 [inline]\n ____kasan_kmalloc mm/kasan/common.c:472 [inline]\n __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:522\n kasan_kmalloc include/linux/kasan.h:269 [inline]\n kmem_cache_alloc_trace+0x1ea/0x4a0 mm/slab.c:3575\n kmalloc include/linux/slab.h:590 [inline]\n nft_setelem_catchall_insert net/netfilter/nf_tables_api.c:5544 [inline]\n nft_setelem_insert net/netfilter/nf_tables_api.c:5562 [inline]\n nft_add_set_elem+0x232e/0x2f40 net/netfilter/nf_tables_api.c:5936\n nf_tables_newsetelem+0x6ff/0xbb0 net/netfilter/nf_tables_api.c:6032\n nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline]\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345\n netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1921\n sock_sendmsg_nosec net/\n---truncated---"
        }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/0f7d9b31ce7abdbb29bf018131ac920c9f698518"
        }
      ],
      "title": "netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47106",
    "datePublished": "2024-03-04T18:15:20.190Z",
    "dateReserved": "2024-03-04T18:12:48.835Z",
    "dateUpdated": "2024-11-04T11:59:31.441Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47106\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-04T19:15:18.750\",\"lastModified\":\"2024-03-05T13:41:01.900\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()\\n\\nWe need to use list_for_each_entry_safe() iterator\\nbecause we can not access @catchall after kfree_rcu() call.\\n\\nsyzbot reported:\\n\\nBUG: KASAN: use-after-free in nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [inline]\\nBUG: KASAN: use-after-free in nft_set_destroy net/netfilter/nf_tables_api.c:4504 [inline]\\nBUG: KASAN: use-after-free in nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_api.c:4493\\nRead of size 8 at addr ffff8880716e5b80 by task syz-executor.3/8871\\n\\nCPU: 1 PID: 8871 Comm: syz-executor.3 Not tainted 5.16.0-rc5-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\\n print_address_description.constprop.0.cold+0x8d/0x2ed mm/kasan/report.c:247\\n __kasan_report mm/kasan/report.c:433 [inline]\\n kasan_report.cold+0x83/0xdf mm/kasan/report.c:450\\n nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [inline]\\n nft_set_destroy net/netfilter/nf_tables_api.c:4504 [inline]\\n nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_api.c:4493\\n __nft_release_table+0x79f/0xcd0 net/netfilter/nf_tables_api.c:9626\\n nft_rcv_nl_event+0x4f8/0x670 net/netfilter/nf_tables_api.c:9688\\n notifier_call_chain+0xb5/0x200 kernel/notifier.c:83\\n blocking_notifier_call_chain kernel/notifier.c:318 [inline]\\n blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:306\\n netlink_release+0xcb6/0x1dd0 net/netlink/af_netlink.c:788\\n __sock_release+0xcd/0x280 net/socket.c:649\\n sock_close+0x18/0x20 net/socket.c:1314\\n __fput+0x286/0x9f0 fs/file_table.c:280\\n task_work_run+0xdd/0x1a0 kernel/task_work.c:164\\n tracehook_notify_resume include/linux/tracehook.h:189 [inline]\\n exit_to_user_mode_loop kernel/entry/common.c:175 [inline]\\n exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207\\n __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]\\n syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300\\n do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\\nRIP: 0033:0x7f75fbf28adb\\nCode: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44\\nRSP: 002b:00007ffd8da7ec10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003\\nRAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f75fbf28adb\\nRDX: 00007f75fc08e828 RSI: ffffffffffffffff RDI: 0000000000000003\\nRBP: 00007f75fc08a960 R08: 0000000000000000 R09: 00007f75fc08e830\\nR10: 00007ffd8da7ed10 R11: 0000000000000293 R12: 00000000002067c3\\nR13: 00007ffd8da7ed10 R14: 00007f75fc088f60 R15: 0000000000000032\\n \u003c/TASK\u003e\\n\\nAllocated by task 8886:\\n kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38\\n kasan_set_track mm/kasan/common.c:46 [inline]\\n set_alloc_info mm/kasan/common.c:434 [inline]\\n ____kasan_kmalloc mm/kasan/common.c:513 [inline]\\n ____kasan_kmalloc mm/kasan/common.c:472 [inline]\\n __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:522\\n kasan_kmalloc include/linux/kasan.h:269 [inline]\\n kmem_cache_alloc_trace+0x1ea/0x4a0 mm/slab.c:3575\\n kmalloc include/linux/slab.h:590 [inline]\\n nft_setelem_catchall_insert net/netfilter/nf_tables_api.c:5544 [inline]\\n nft_setelem_insert net/netfilter/nf_tables_api.c:5562 [inline]\\n nft_add_set_elem+0x232e/0x2f40 net/netfilter/nf_tables_api.c:5936\\n nf_tables_newsetelem+0x6ff/0xbb0 net/netfilter/nf_tables_api.c:6032\\n nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513\\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:634 [inline]\\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652\\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345\\n netlink_sendmsg+0x904/0xdf0 net/netlink/af_netlink.c:1921\\n sock_sendmsg_nosec net/\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: corrige use-after-free en nft_set_catchall_destroy() Necesitamos usar el iterador list_for_each_entry_safe() porque no podemos acceder a @catchall despu\u00e9s de la llamada a kfree_rcu(). syzbot inform\u00f3: ERROR: KASAN: use-after-free en nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [en l\u00ednea] ERROR: KASAN: use-after-free en nft_set_destroy net/netfilter/nf_tables_api.c:4504 [en l\u00ednea] ERROR : KASAN: use-after-free en nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_api.c:4493 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8880716e5b80 por tarea syz-executor.3/8871 CPU: 1 PID: 8871 Comm: syz-executor .3 No contaminado 5.16.0-rc5-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl +0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x2ed mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [en l\u00ednea] kasan_report.cold+0x83/ 0xdf mm/kasan/report.c:450 nft_set_catchall_destroy net/netfilter/nf_tables_api.c:4486 [en l\u00ednea] nft_set_destroy net/netfilter/nf_tables_api.c:4504 [en l\u00ednea] nft_set_destroy+0x3fd/0x4f0 net/netfilter/nf_tables_a foto.c:4493 __nft_release_table+0x79f/0xcd0 net/netfilter/nf_tables_api.c:9626 nft_rcv_nl_event+0x4f8/0x670 net/netfilter/nf_tables_api.c:9688 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 blocking_notifier_call_chain kernel/ notificador.c:318 [en l\u00ednea ] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:306 netlink_release+0xcb6/0x1dd0 net/netlink/af_netlink.c:788 __sock_release+0xcd/0x280 net/socket.c:649 sock_close+0x18/0x20 net/socket.c: 1314 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [en l\u00ednea] exit_to_user_mode_loop kernel/entry/common.c:175 [en l\u00ednea ] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [en l\u00ednea] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/ 0xb0 arco/x86 /entry/common.c:86 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f75fbf28adb C\u00f3digo: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 \u0026lt;48\u0026gt; 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffd8da7ec10 EFLAGS: 0000 0293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f75fbf28adb RDX: 00007f75fc08e828 RSI: ffffffffffffffff RDI: 00000000000000003 RBP: 00007f75fc08a960 R08: 000000 0000000000 R09: 00007f75fc08e830 R10: 00007ffd8da7ed10 R11: 0000000000000293 R12: 00000000002067c3 R13: 00007ffd8da7ed10 R14: 00007f75fc0 88f60 R15: 0000000000000032  Asignado por la tarea 8886 : kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [en l\u00ednea] set_alloc_info mm/kasan/common.c:434 [en l\u00ednea] ____kasan_kmalloc mm/kasan/common.c: 513 [en l\u00ednea] ____kasan_kmalloc mm/kasan/common.c:472 [en l\u00ednea] __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:269 [en l\u00ednea] kmem_cache_alloc_trace+0x1ea/0x4a0 mm /slab.c:3575 kmalloc include/linux/slab.h:590 [en l\u00ednea] nft_setelem_catchall_insert net/netfilter/nf_tables_api.c:5544 [en l\u00ednea] nft_setelem_insert net/netfilter/nf_tables_api.c:5562 [en l\u00ednea] nft_add_set_elem+0x232e/0 x2f40 net/netfilter/nf_tables_api.c:5936 nf_tables_newsetelem+0x6ff/0xbb0 net/netfilter/nf_tables_api.c:6032 nfnetlink_rcv_batch+0x1710/0x25f0 net/netfilter/nfnetlink.c:513 nfnetlink_rcv_skb_batch net/netfilter/ nfnetlink.c:634 [en l\u00ednea] nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:652 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [en l\u00ednea]---truncado---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0f7d9b31ce7abdbb29bf018131ac920c9f698518\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d558e5f0d6fdd0a568f73dceb0b40c4f5012e5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.