cve-2022-48719
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2024-11-04 12:15
Severity ?
Summary
net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "dateUpdated": "2024-08-03T15:24:59.987Z",
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            "url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772"
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              "content": {
                "id": "CVE-2022-48719",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:11:19.414078Z",
                "version": "2.0.3"
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          "dateUpdated": "2024-09-11T17:34:49.740Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/neighbour.h",
            "net/core/neighbour.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "7482e3841d52",
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          "product": "Linux",
          "programFiles": [
            "include/net/neighbour.h",
            "net/core/neighbour.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.16"
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              "lessThan": "5.16",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\n\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\n\n  kworker/0:16/14617 is trying to acquire lock:\n  ffffffff8d4dd370 (\u0026tbl-\u003elock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n  [...]\n  but task is already holding lock:\n  ffffffff8d4dd370 (\u0026tbl-\u003elock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\n\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\"neigh: reduce\narp latency\") via neigh_probe() given table lock was held.\n\nOne option to fix this situation is to defer the neigh_probe() back to\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\nof NTF_MANAGED, this deferral is acceptable given this only happens on\nactual failure state and regular / expected state is NUD_VALID with the\nentry already present.\n\nThe fix adds a parameter to __neigh_event_send() in order to communicate\nwhether immediate probe is allowed or disallowed. Existing call-sites\nof neigh_event_send() default as-is to immediate probe. However, the\nneigh_managed_work() disables it via use of neigh_event_send_probe().\n\n[0] \u003cTASK\u003e\n  __dump_stack lib/dump_stack.c:88 [inline]\n  dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n  print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\n  check_deadlock kernel/locking/lockdep.c:2999 [inline]\n  validate_chain kernel/locking/lockdep.c:3788 [inline]\n  __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\n  lock_acquire kernel/locking/lockdep.c:5639 [inline]\n  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\n  __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\n  _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\n  ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\n  ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\n  __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\n  __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\n  ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\n  NF_HOOK_COND include/linux/netfilter.h:296 [inline]\n  ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\n  dst_output include/net/dst.h:451 [inline]\n  NF_HOOK include/linux/netfilter.h:307 [inline]\n  ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\n  ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\n  ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\n  neigh_probe+0xc2/0x110 net/core/neighbour.c:1040\n  __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\n  neigh_event_send include/net/neighbour.h:470 [inline]\n  neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\n  process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\n  worker_thread+0x657/0x1110 kernel/workqueue.c:2454\n  kthread+0x2e9/0x3a0 kernel/kthread.c:377\n  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n  \u003c/TASK\u003e"
        }
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      "providerMetadata": {
        "dateUpdated": "2024-11-04T12:15:11.926Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364"
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        {
          "url": "https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772"
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      ],
      "title": "net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48719",
    "datePublished": "2024-06-20T11:13:11.362Z",
    "dateReserved": "2024-06-20T11:09:39.051Z",
    "dateUpdated": "2024-11-04T12:15:11.926Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48719\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-20T11:15:55.470\",\"lastModified\":\"2024-09-18T16:58:08.113\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work\\n\\nsyzkaller was able to trigger a deadlock for NTF_MANAGED entries [0]:\\n\\n  kworker/0:16/14617 is trying to acquire lock:\\n  ffffffff8d4dd370 (\u0026tbl-\u003elock){++-.}-{2:2}, at: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\\n  [...]\\n  but task is already holding lock:\\n  ffffffff8d4dd370 (\u0026tbl-\u003elock){++-.}-{2:2}, at: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572\\n\\nThe neighbor entry turned to NUD_FAILED state, where __neigh_event_send()\\ntriggered an immediate probe as per commit cd28ca0a3dd1 (\\\"neigh: reduce\\narp latency\\\") via neigh_probe() given table lock was held.\\n\\nOne option to fix this situation is to defer the neigh_probe() back to\\nthe neigh_timer_handler() similarly as pre cd28ca0a3dd1. For the case\\nof NTF_MANAGED, this deferral is acceptable given this only happens on\\nactual failure state and regular / expected state is NUD_VALID with the\\nentry already present.\\n\\nThe fix adds a parameter to __neigh_event_send() in order to communicate\\nwhether immediate probe is allowed or disallowed. Existing call-sites\\nof neigh_event_send() default as-is to immediate probe. However, the\\nneigh_managed_work() disables it via use of neigh_event_send_probe().\\n\\n[0] \u003cTASK\u003e\\n  __dump_stack lib/dump_stack.c:88 [inline]\\n  dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\\n  print_deadlock_bug kernel/locking/lockdep.c:2956 [inline]\\n  check_deadlock kernel/locking/lockdep.c:2999 [inline]\\n  validate_chain kernel/locking/lockdep.c:3788 [inline]\\n  __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027\\n  lock_acquire kernel/locking/lockdep.c:5639 [inline]\\n  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604\\n  __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline]\\n  _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334\\n  ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652\\n  ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123\\n  __ip6_finish_output net/ipv6/ip6_output.c:191 [inline]\\n  __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170\\n  ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201\\n  NF_HOOK_COND include/linux/netfilter.h:296 [inline]\\n  ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224\\n  dst_output include/net/dst.h:451 [inline]\\n  NF_HOOK include/linux/netfilter.h:307 [inline]\\n  ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508\\n  ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650\\n  ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c:742\\n  neigh_probe+0xc2/0x110 net/core/neighbour.c:1040\\n  __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201\\n  neigh_event_send include/net/neighbour.h:470 [inline]\\n  neigh_managed_work+0x162/0x250 net/core/neighbour.c:1574\\n  process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307\\n  worker_thread+0x657/0x1110 kernel/workqueue.c:2454\\n  kthread+0x2e9/0x3a0 kernel/kthread.c:377\\n  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\\n  \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, neigh: no activar sondas inmediatas en NUD_FAILED desde neigh_managed_work syzkaller pudo activar un punto muerto para las entradas NTF_MANAGED [0]: kworker/0:16/14617 est\u00e1 intentando adquirir bloqueo: ffffffff8d4dd370 (\u0026amp;tbl-\u0026gt;lock){++-.}-{2:2}, en: ___neigh_create+0x9e1/0x2990 net/core/neighbour.c:652 [...] pero la tarea ya mantiene el bloqueo: ffffffff8d4dd370 (\u0026amp;tbl-\u0026gt;lock){++-.}-{2:2}, en: neigh_managed_work+0x35/0x250 net/core/neighbour.c:1572 La entrada del vecino pas\u00f3 al estado NUD_FAILED, donde __neigh_event_send() desencaden\u00f3 una Sondeo inmediato seg\u00fan el commit cd28ca0a3dd1 (\\\"relincho: reducir la latencia de arp\\\") a trav\u00e9s de neigh_probe() dado que se mantuvo el bloqueo de la tabla. Una opci\u00f3n para solucionar esta situaci\u00f3n es posponer neigh_probe() nuevamente a neigh_timer_handler() de manera similar a como se hac\u00eda antes de cd28ca0a3dd1. Para el caso de NTF_MANAGED, este aplazamiento es aceptable dado que esto solo ocurre en el estado de falla real y el estado normal/esperado es NUD_VALID con la entrada ya presente. La soluci\u00f3n agrega un par\u00e1metro a __neigh_event_send() para comunicar si se permite o no la sonda inmediata. Los sitios de llamadas existentes de neigh_event_send() est\u00e1n predeterminados tal cual para la investigaci\u00f3n inmediata. Sin embargo, neigh_managed_work() lo desactiva mediante el uso de neigh_event_send_probe(). [0]  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_deadlock_bug kernel/locking/lockdep.c:2956 [en l\u00ednea] check_deadlock kernel/locking/lockdep.c :2999 [en l\u00ednea] validar_chain kernel/locking/lockdep.c:3788 [en l\u00ednea] __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [en l\u00ednea] lock_acquire+0x1ab /0x510 kernel/locking/lockdep.c:5604 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [en l\u00ednea] _raw_write_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:334 ___neigh_create+0x9e1/0x2990 net/core/neighbour.c :652 ip6_finish_output2+0x1070/0x14f0 net/ipv6/ip6_output.c:123 __ip6_finish_output net/ipv6/ip6_output.c:191 [en l\u00ednea] __ip6_finish_output+0x61e/0xe90 net/ipv6/ip6_output.c:170 poner+0x32/0x200 neto/ ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [en l\u00ednea] ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:451 [en l\u00ednea] NF_HOOK include/ linux/netfilter.h:307 [en l\u00ednea] ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508 ndisc_send_ns+0x3a9/0x840 net/ipv6/ndisc.c:650 ndisc_solicit+0x2cd/0x4f0 net/ipv6/ndisc.c :742 neigh_probe+0xc2/0x110 net/core/neighbour.c:1040 __neigh_event_send+0x37d/0x1570 net/core/neighbour.c:1201 neigh_event_send include/net/neighbour.h:470 [en l\u00ednea] neigh_managed_work+0x162/0x250 net/ core/neighbour.c:1574 Process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307 trabajador_thread+0x657/0x1110 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/ x86/entry/entry_64.S:295 \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.8\",\"matchCriteriaId\":\"0623892A-E3E4-44E6-8A5E-39A0B47AF782\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7BD5F8D9-54FA-4CB0-B4F0-CB0471FDDB2D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"E6E34B23-78B4-4516-9BD8-61B33F4AC49A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/203a35ebb49cdce377416b0690215d3ce090d364\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4a81f6da9cb2d1ef911131a6fd8bd15cb61fc772\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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