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CVE-2021-47400 (GCVE-0-2021-47400)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-08-05 08:47
VLAI
Title
net: hns3: do not allow call hns3_nic_net_open repeatedly
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hns3: do not allow call hns3_nic_net_open repeatedly hns3_nic_net_open() is not allowed to called repeatly, but there is no checking for this. When doing device reset and setup tc concurrently, there is a small oppotunity to call hns3_nic_net_open repeatedly, and cause kernel bug by calling napi_enable twice. The calltrace information is like below: [ 3078.222780] ------------[ cut here ]------------ [ 3078.230255] kernel BUG at net/core/dev.c:6991! [ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O) [ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G O 5.14.0-rc4+ #1 [ 3078.269102] Hardware name: , BIOS KpxxxFPGA 1P B600 V181 08/12/2021 [ 3078.276801] Workqueue: hclge hclge_service_task [hclge] [ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 3078.296168] pc : napi_enable+0x80/0x84 tc qdisc sho[w 3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3] [ 3078.314771] sp : ffff8000108abb20 [ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300 [ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000 [ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880 [ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000 [ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930 [ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4 [ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8 [ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344 [ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938 [ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0 [ 3078.414657] Call trace: [ 3078.418517] napi_enable+0x80/0x84 [ 3078.424626] hns3_reset_notify_up_enet+0x78/0xd0 [hns3] [ 3078.433469] hns3_reset_notify+0x64/0x80 [hns3] [ 3078.441430] hclge_notify_client+0x68/0xb0 [hclge] [ 3078.450511] hclge_reset_rebuild+0x524/0x884 [hclge] [ 3078.458879] hclge_reset_service_task+0x3c4/0x680 [hclge] [ 3078.467470] hclge_service_task+0xb0/0xb54 [hclge] [ 3078.475675] process_one_work+0x1dc/0x48c [ 3078.481888] worker_thread+0x15c/0x464 [ 3078.487104] kthread+0x160/0x170 [ 3078.492479] ret_from_fork+0x10/0x18 [ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000) [ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]--- Once hns3_nic_net_open() is excute success, the flag HNS3_NIC_STATE_DOWN will be cleared. So add checking for this flag, directly return when HNS3_NIC_STATE_DOWN is no set.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 18:26 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e888402789b9db5de4fcda361331d66dbf0cd9fd , < 5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d (git)
Affected: e888402789b9db5de4fcda361331d66dbf0cd9fd , < f8ba689cb69523144d10606096ef686002dd7285 (git)
Affected: e888402789b9db5de4fcda361331d66dbf0cd9fd , < 3dac38bdce7932901b9f0b71c62331852c809e61 (git)
Affected: e888402789b9db5de4fcda361331d66dbf0cd9fd , < 5b09e88e1bf7fe86540fab4b5f3eece8abead39e (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 5.4.151 , ≤ 5.4.* (semver)
Unaffected: 5.10.71 , ≤ 5.10.* (semver)
Unaffected: 5.14.10 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: do not allow call hns3_nic_net_open repeatedly\n\nhns3_nic_net_open() is not allowed to called repeatly, but there\nis no checking for this. When doing device reset and setup tc\nconcurrently, there is a small oppotunity to call hns3_nic_net_open\nrepeatedly, and cause kernel bug by calling napi_enable twice.\n\nThe calltrace information is like below:\n[ 3078.222780] ------------[ cut here ]------------\n[ 3078.230255] kernel BUG at net/core/dev.c:6991!\n[ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\n[ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O)\n[ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G           O      5.14.0-rc4+ #1\n[ 3078.269102] Hardware name:  , BIOS KpxxxFPGA 1P B600 V181 08/12/2021\n[ 3078.276801] Workqueue: hclge hclge_service_task [hclge]\n[ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)\n[ 3078.296168] pc : napi_enable+0x80/0x84\ntc qdisc sho[w  3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3]\n\n[ 3078.314771] sp : ffff8000108abb20\n[ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300\n[ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000\n[ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880\n[ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000\n[ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930\n[ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4\n[ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8\n[ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344\n[ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938\n[ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0\n[ 3078.414657] Call trace:\n[ 3078.418517]  napi_enable+0x80/0x84\n[ 3078.424626]  hns3_reset_notify_up_enet+0x78/0xd0 [hns3]\n[ 3078.433469]  hns3_reset_notify+0x64/0x80 [hns3]\n[ 3078.441430]  hclge_notify_client+0x68/0xb0 [hclge]\n[ 3078.450511]  hclge_reset_rebuild+0x524/0x884 [hclge]\n[ 3078.458879]  hclge_reset_service_task+0x3c4/0x680 [hclge]\n[ 3078.467470]  hclge_service_task+0xb0/0xb54 [hclge]\n[ 3078.475675]  process_one_work+0x1dc/0x48c\n[ 3078.481888]  worker_thread+0x15c/0x464\n[ 3078.487104]  kthread+0x160/0x170\n[ 3078.492479]  ret_from_fork+0x10/0x18\n[ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000)\n[ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]---\n\nOnce hns3_nic_net_open() is excute success, the flag\nHNS3_NIC_STATE_DOWN will be cleared. So add checking for this\nflag, directly return when HNS3_NIC_STATE_DOWN is no set."
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            "baseSeverity": "HIGH",
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              "lang": "en",
              "value": "AV:L - Exploitation requires local netlink/ioctl access to the hns3 PF (tc mqprio via ndo_setup_tc and/or ethtool reset), not remotely delivered packets or adjacent-network protocols.\nAC:L - An attacker with CAP_NET_ADMIN can trigger both sides of the race (ethtool --reset schedules hclge_reset_rebuild, which drops rtnl between phases, while concurrently running tc mqprio setup_tc) and retry until the window is hit.\nPR:L - Triggering setup_tc and ethtool reset requires CAP_NET_ADMIN in the netns that owns the hns3 PF; that capability is obtainable via user namespaces when the device is present in that netns, so this is Low rather than High.\nUI:N - The attacker directly issues the reset and tc configuration operations; no separate victim action is required.\nS:U - Impact is confined to the host kernel that owns the hns3 driver; there is no VM/IOMMU/sandbox boundary crossing.\nC:H - The second hns3_nic_net_open runs hns3_nic_reset_all_ring/hns3_clear_tx_ring on rings that are already live, freeing in-flight skbs/DMA buffers while NAPI/Tx may still reference them, yielding a UAF-class disclosure primitive.\nI:H - The same live-ring clear/reuse before the duplicate napi_enable enables double-free/UAF of descriptor buffers and skbs, which is exploitable for integrity compromise and control-flow hijacking.\nA:H - The duplicate napi_enable path hits BUG_ON(!NAPI_STATE_SCHED) in net/core/dev.c, producing a kernel BUG/oops and denial of service."
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        "shortName": "Linux"
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      "title": "net: hns3: do not allow call hns3_nic_net_open repeatedly",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47400",
    "datePublished": "2024-05-21T15:03:55.368Z",
    "dateReserved": "2024-05-21T14:58:30.816Z",
    "dateUpdated": "2026-08-05T08:47:40.000Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47400",
      "date": "2026-09-16",
      "epss": "0.00254",
      "percentile": "0.17065"
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    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hns3: do not allow call hns3_nic_net_open repeatedly\\n\\nhns3_nic_net_open() is not allowed to called repeatly, but there\\nis no checking for this. When doing device reset and setup tc\\nconcurrently, there is a small oppotunity to call hns3_nic_net_open\\nrepeatedly, and cause kernel bug by calling napi_enable twice.\\n\\nThe calltrace information is like below:\\n[ 3078.222780] ------------[ cut here ]------------\\n[ 3078.230255] kernel BUG at net/core/dev.c:6991!\\n[ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\\n[ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O)\\n[ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G           O      5.14.0-rc4+ #1\\n[ 3078.269102] Hardware name:  , BIOS KpxxxFPGA 1P B600 V181 08/12/2021\\n[ 3078.276801] Workqueue: hclge hclge_service_task [hclge]\\n[ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)\\n[ 3078.296168] pc : napi_enable+0x80/0x84\\ntc qdisc sho[w  3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3]\\n\\n[ 3078.314771] sp : ffff8000108abb20\\n[ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300\\n[ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000\\n[ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880\\n[ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000\\n[ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930\\n[ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4\\n[ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8\\n[ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344\\n[ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938\\n[ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0\\n[ 3078.414657] Call trace:\\n[ 3078.418517]  napi_enable+0x80/0x84\\n[ 3078.424626]  hns3_reset_notify_up_enet+0x78/0xd0 [hns3]\\n[ 3078.433469]  hns3_reset_notify+0x64/0x80 [hns3]\\n[ 3078.441430]  hclge_notify_client+0x68/0xb0 [hclge]\\n[ 3078.450511]  hclge_reset_rebuild+0x524/0x884 [hclge]\\n[ 3078.458879]  hclge_reset_service_task+0x3c4/0x680 [hclge]\\n[ 3078.467470]  hclge_service_task+0xb0/0xb54 [hclge]\\n[ 3078.475675]  process_one_work+0x1dc/0x48c\\n[ 3078.481888]  worker_thread+0x15c/0x464\\n[ 3078.487104]  kthread+0x160/0x170\\n[ 3078.492479]  ret_from_fork+0x10/0x18\\n[ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000)\\n[ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]---\\n\\nOnce hns3_nic_net_open() is excute success, the flag\\nHNS3_NIC_STATE_DOWN will be cleared. So add checking for this\\nflag, directly return when HNS3_NIC_STATE_DOWN is no set.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: hns3: no permitir llamadas repetidas a hns3_nic_net_open. No se permite llamar repetidamente a hns3_nic_net_open(), pero no se puede verificar esto. Al restablecer y configurar tc el dispositivo simult\\u00e1neamente, existe una peque\\u00f1a oportunidad de llamar a hns3_nic_net_open repetidamente y causar un error en el kernel al llamar a napi_enable dos veces. La informaci\\u00f3n del seguimiento de llamadas es la siguiente: [3078.222780] ------------[ cortar aqu\\u00ed ]------------ [ 3078.230255] BUG del kernel en net/core/dev. c:6991! [3078.236224] Error interno: Ups - BUG: 0 [#1] SMP PREEMPLEADO [3078.243431] M\\u00f3dulos vinculados en: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O) [ 3078.258880 CPU : 0 PID: 295 Comunicaciones: kworker/u8 :5 Contaminado: GO 5.14.0-rc4+ #1 [ 3078.269102] Nombre de hardware: , BIOS KpxxxFPGA 1P B600 V181 12/08/2021 [ 3078.276801] Cola de trabajo: hclge hclge_service_task [hclge] [ 3078.288774] pstate: 0009 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 3078.296168] pc : napi_enable+0x80/0x84 tc qdisc sho[w 3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3] [ 3078.314771] sp : 8000108abb20 [3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300 [ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 00000000000 00000 [ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880 [ 3078.349018] x20: 0000000000000000 x19: 00 x18: 0000000000000000 [ 3078.358620] x17: 0000000000000000 x16 : ffffc816e1727a50 x15: 0000ffff8f4ff930 [ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4 [ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9: ffffc816ad8885b8 [3078.387091] x8: ffff08209cfc6fb8 x7: ffff0820ac0da058 x6: ffff0820a8490344 [ 3 078.396356] x5: 0000000000000140 x4: 0000000000000003 x3: ffff08209cd76938 [3078.405365] x2: 0000000000000000 x1: 0000000000000010 x0: ffff0820abfe38a0 [3078.414657] Rastreo de llamadas: [3078.418517] +0x80/0x84 [ 3078.424626] hns3_reset_notify_up_enet+0x78/0xd0 [hns3] [ 3078.433469] hns3_reset_notify+0x64/0x80 [hns3 ] [ 3078.441430] hclge_notify_client+0x68/0xb0 [hclge] [ 3078.450511] hclge_reset_rebuild+0x524/0x884 [hclge] [ 3078.458879] hclge_reset_service_task+0x3c4/0x680 [hclge] 3078.467470] hclge_service_task+0xb0/0xb54 [hclge] [ 3078.475675] proceso_one_work+ 0x1dc/0x48c [ 3078.481888] work_thread+0x15c/0x464 [ 3078.487104] kthread+0x160/0x170 [ 3078.492479] ret_from_fork+0x10/0x18 [ 3078.498785] C\\u00f3digo: c81 35ffffa2 d50323bf d65f03c0 (d4210000) [ 3078.506889] ---[ final de seguimiento 8ebe0340a1b0fb44 ] --- Una vez que hns3_nic_net_open() se ejecute correctamente, se borrar\\u00e1 el indicador HNS3_NIC_STATE_DOWN. Por lo tanto, agregue la verificaci\\u00f3n de este indicador y regrese directamente cuando HNS3_NIC_STATE_DOWN no est\\u00e9 configurado.\"}]",
      "id": "CVE-2021-47400",
      "lastModified": "2024-11-21T06:36:03.997",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"baseScore\": 4.0, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 2.5, \"impactScore\": 1.4}]}",
      "published": "2024-05-21T15:15:25.457",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/3dac38bdce7932901b9f0b71c62331852c809e61\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/5b09e88e1bf7fe86540fab4b5f3eece8abead39e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/f8ba689cb69523144d10606096ef686002dd7285\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/3dac38bdce7932901b9f0b71c62331852c809e61\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/5b09e88e1bf7fe86540fab4b5f3eece8abead39e\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/f8ba689cb69523144d10606096ef686002dd7285\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47400\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:25.457\",\"lastModified\":\"2026-08-04T10:17:01.910\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hns3: do not allow call hns3_nic_net_open repeatedly\\n\\nhns3_nic_net_open() is not allowed to called repeatly, but there\\nis no checking for this. When doing device reset and setup tc\\nconcurrently, there is a small oppotunity to call hns3_nic_net_open\\nrepeatedly, and cause kernel bug by calling napi_enable twice.\\n\\nThe calltrace information is like below:\\n[ 3078.222780] ------------[ cut here ]------------\\n[ 3078.230255] kernel BUG at net/core/dev.c:6991!\\n[ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\\n[ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O)\\n[ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G           O      5.14.0-rc4+ #1\\n[ 3078.269102] Hardware name:  , BIOS KpxxxFPGA 1P B600 V181 08/12/2021\\n[ 3078.276801] Workqueue: hclge hclge_service_task [hclge]\\n[ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)\\n[ 3078.296168] pc : napi_enable+0x80/0x84\\ntc qdisc sho[w  3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3]\\n\\n[ 3078.314771] sp : ffff8000108abb20\\n[ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300\\n[ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000\\n[ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880\\n[ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000\\n[ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930\\n[ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4\\n[ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8\\n[ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344\\n[ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938\\n[ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0\\n[ 3078.414657] Call trace:\\n[ 3078.418517]  napi_enable+0x80/0x84\\n[ 3078.424626]  hns3_reset_notify_up_enet+0x78/0xd0 [hns3]\\n[ 3078.433469]  hns3_reset_notify+0x64/0x80 [hns3]\\n[ 3078.441430]  hclge_notify_client+0x68/0xb0 [hclge]\\n[ 3078.450511]  hclge_reset_rebuild+0x524/0x884 [hclge]\\n[ 3078.458879]  hclge_reset_service_task+0x3c4/0x680 [hclge]\\n[ 3078.467470]  hclge_service_task+0xb0/0xb54 [hclge]\\n[ 3078.475675]  process_one_work+0x1dc/0x48c\\n[ 3078.481888]  worker_thread+0x15c/0x464\\n[ 3078.487104]  kthread+0x160/0x170\\n[ 3078.492479]  ret_from_fork+0x10/0x18\\n[ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000)\\n[ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]---\\n\\nOnce hns3_nic_net_open() is excute success, the flag\\nHNS3_NIC_STATE_DOWN will be cleared. So add checking for this\\nflag, directly return when HNS3_NIC_STATE_DOWN is no set.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: hns3: no permitir llamadas repetidas a hns3_nic_net_open. No se permite llamar repetidamente a hns3_nic_net_open(), pero no se puede verificar esto. Al restablecer y configurar tc el dispositivo simult\u00e1neamente, existe una peque\u00f1a oportunidad de llamar a hns3_nic_net_open repetidamente y causar un error en el kernel al llamar a napi_enable dos veces. La informaci\u00f3n del seguimiento de llamadas es la siguiente: [3078.222780] ------------[ cortar aqu\u00ed ]------------ [ 3078.230255] BUG del kernel en net/core/dev. c:6991! [3078.236224] Error interno: Ups - BUG: 0 [#1] SMP PREEMPLEADO [3078.243431] M\u00f3dulos vinculados en: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O) [ 3078.258880 CPU : 0 PID: 295 Comunicaciones: kworker/u8 :5 Contaminado: GO 5.14.0-rc4+ #1 [ 3078.269102] Nombre de hardware: , BIOS KpxxxFPGA 1P B600 V181 12/08/2021 [ 3078.276801] Cola de trabajo: hclge hclge_service_task [hclge] [ 3078.288774] pstate: 0009 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 3078.296168] pc : napi_enable+0x80/0x84 tc qdisc sho[w 3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3] [ 3078.314771] sp : 8000108abb20 [3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300 [ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 00000000000 00000 [ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880 [ 3078.349018] x20: 0000000000000000 x19: 00 x18: 0000000000000000 [ 3078.358620] x17: 0000000000000000 x16 : ffffc816e1727a50 x15: 0000ffff8f4ff930 [ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4 [ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9: ffffc816ad8885b8 [3078.387091] x8: ffff08209cfc6fb8 x7: ffff0820ac0da058 x6: ffff0820a8490344 [ 3 078.396356] x5: 0000000000000140 x4: 0000000000000003 x3: ffff08209cd76938 [3078.405365] x2: 0000000000000000 x1: 0000000000000010 x0: ffff0820abfe38a0 [3078.414657] Rastreo de llamadas: [3078.418517] +0x80/0x84 [ 3078.424626] hns3_reset_notify_up_enet+0x78/0xd0 [hns3] [ 3078.433469] hns3_reset_notify+0x64/0x80 [hns3 ] [ 3078.441430] hclge_notify_client+0x68/0xb0 [hclge] [ 3078.450511] hclge_reset_rebuild+0x524/0x884 [hclge] [ 3078.458879] hclge_reset_service_task+0x3c4/0x680 [hclge] 3078.467470] hclge_service_task+0xb0/0xb54 [hclge] [ 3078.475675] proceso_one_work+ 0x1dc/0x48c [ 3078.481888] work_thread+0x15c/0x464 [ 3078.487104] kthread+0x160/0x170 [ 3078.492479] ret_from_fork+0x10/0x18 [ 3078.498785] C\u00f3digo: c81 35ffffa2 d50323bf d65f03c0 (d4210000) [ 3078.506889] ---[ final de seguimiento 8ebe0340a1b0fb44 ] --- Una vez que hns3_nic_net_open() se ejecute correctamente, se borrar\u00e1 el indicador HNS3_NIC_STATE_DOWN. Por lo tanto, agregue la verificaci\u00f3n de este indicador y regrese directamente cuando HNS3_NIC_STATE_DOWN no est\u00e9 configurado.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/hisilicon/hns3/hns3_enet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e888402789b9db5de4fcda361331d66dbf0cd9fd\",\"lessThan\":\"5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e888402789b9db5de4fcda361331d66dbf0cd9fd\",\"lessThan\":\"f8ba689cb69523144d10606096ef686002dd7285\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e888402789b9db5de4fcda361331d66dbf0cd9fd\",\"lessThan\":\"3dac38bdce7932901b9f0b71c62331852c809e61\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e888402789b9db5de4fcda361331d66dbf0cd9fd\",\"lessThan\":\"5b09e88e1bf7fe86540fab4b5f3eece8abead39e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/hisilicon/hns3/hns3_enet.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.151\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.71\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.14.10\",\"lessThanOrEqual\":\"5.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"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\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.5,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-05-28T18:26:38.689847Z\",\"id\":\"CVE-2021-47400\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:57:03+00:00",
      "cve": "CVE-2021-47400",
      "id": "CVE-2021-47400",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "513",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "91",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: hns3: do not allow call hns3_nic_net_open repeatedly",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47400.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:38:46Z",
      "cve": "CVE-2021-47400",
      "id": "CVE-2021-47400",
      "initial_release_date": "2024-05-28T03:34:15Z",
      "product_status:known_affected": "375",
      "product_status:known_not_affected": "141",
      "product_status:recommended": "551",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47400",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47400.json",
      "version": "62"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f8ba689cb69523144d10606096ef686002dd7285\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3dac38bdce7932901b9f0b71c62331852c809e61\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5b09e88e1bf7fe86540fab4b5f3eece8abead39e\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.446Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47400\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-28T18:26:38.689847Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-28T18:26:46.002Z\"}}], \"cna\": {\"title\": \"net: hns3: do not allow call hns3_nic_net_open repeatedly\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - Exploitation requires local netlink/ioctl access to the hns3 PF (tc mqprio via ndo_setup_tc and/or ethtool reset), not remotely delivered packets or adjacent-network protocols.\\nAC:L - An attacker with CAP_NET_ADMIN can trigger both sides of the race (ethtool --reset schedules hclge_reset_rebuild, which drops rtnl between phases, while concurrently running tc mqprio setup_tc) and retry until the window is hit.\\nPR:L - Triggering setup_tc and ethtool reset requires CAP_NET_ADMIN in the netns that owns the hns3 PF; that capability is obtainable via user namespaces when the device is present in that netns, so this is Low rather than High.\\nUI:N - The attacker directly issues the reset and tc configuration operations; no separate victim action is required.\\nS:U - Impact is confined to the host kernel that owns the hns3 driver; there is no VM/IOMMU/sandbox boundary crossing.\\nC:H - The second hns3_nic_net_open runs hns3_nic_reset_all_ring/hns3_clear_tx_ring on rings that are already live, freeing in-flight skbs/DMA buffers while NAPI/Tx may still reference them, yielding a UAF-class disclosure primitive.\\nI:H - The same live-ring clear/reuse before the duplicate napi_enable enables double-free/UAF of descriptor buffers and skbs, which is exploitable for integrity compromise and control-flow hijacking.\\nA:H - The duplicate napi_enable path hits BUG_ON(!NAPI_STATE_SCHED) in net/core/dev.c, producing a kernel BUG/oops and denial of service.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e888402789b9db5de4fcda361331d66dbf0cd9fd\", \"lessThan\": \"5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888402789b9db5de4fcda361331d66dbf0cd9fd\", \"lessThan\": \"f8ba689cb69523144d10606096ef686002dd7285\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888402789b9db5de4fcda361331d66dbf0cd9fd\", \"lessThan\": \"3dac38bdce7932901b9f0b71c62331852c809e61\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888402789b9db5de4fcda361331d66dbf0cd9fd\", \"lessThan\": \"5b09e88e1bf7fe86540fab4b5f3eece8abead39e\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/hisilicon/hns3/hns3_enet.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.151\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.71\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/hisilicon/hns3/hns3_enet.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5a31d4e73ada8022427b69b10fd1f01a6a8d4b3d\"}, {\"url\": \"https://git.kernel.org/stable/c/f8ba689cb69523144d10606096ef686002dd7285\"}, {\"url\": \"https://git.kernel.org/stable/c/3dac38bdce7932901b9f0b71c62331852c809e61\"}, {\"url\": \"https://git.kernel.org/stable/c/5b09e88e1bf7fe86540fab4b5f3eece8abead39e\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: hns3: do not allow call hns3_nic_net_open repeatedly\\n\\nhns3_nic_net_open() is not allowed to called repeatly, but there\\nis no checking for this. When doing device reset and setup tc\\nconcurrently, there is a small oppotunity to call hns3_nic_net_open\\nrepeatedly, and cause kernel bug by calling napi_enable twice.\\n\\nThe calltrace information is like below:\\n[ 3078.222780] ------------[ cut here ]------------\\n[ 3078.230255] kernel BUG at net/core/dev.c:6991!\\n[ 3078.236224] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\\n[ 3078.243431] Modules linked in: hns3 hclgevf hclge hnae3 vfio_iommu_type1 vfio_pci vfio_virqfd vfio pv680_mii(O)\\n[ 3078.258880] CPU: 0 PID: 295 Comm: kworker/u8:5 Tainted: G           O      5.14.0-rc4+ #1\\n[ 3078.269102] Hardware name:  , BIOS KpxxxFPGA 1P B600 V181 08/12/2021\\n[ 3078.276801] Workqueue: hclge hclge_service_task [hclge]\\n[ 3078.288774] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--)\\n[ 3078.296168] pc : napi_enable+0x80/0x84\\ntc qdisc sho[w  3d0e7v8 .e3t0h218 79] lr : hns3_nic_net_open+0x138/0x510 [hns3]\\n\\n[ 3078.314771] sp : ffff8000108abb20\\n[ 3078.319099] x29: ffff8000108abb20 x28: 0000000000000000 x27: ffff0820a8490300\\n[ 3078.329121] x26: 0000000000000001 x25: ffff08209cfc6200 x24: 0000000000000000\\n[ 3078.339044] x23: ffff0820a8490300 x22: ffff08209cd76000 x21: ffff0820abfe3880\\n[ 3078.349018] x20: 0000000000000000 x19: ffff08209cd76900 x18: 0000000000000000\\n[ 3078.358620] x17: 0000000000000000 x16: ffffc816e1727a50 x15: 0000ffff8f4ff930\\n[ 3078.368895] x14: 0000000000000000 x13: 0000000000000000 x12: 0000259e9dbeb6b4\\n[ 3078.377987] x11: 0096a8f7e764eb40 x10: 634615ad28d3eab5 x9 : ffffc816ad8885b8\\n[ 3078.387091] x8 : ffff08209cfc6fb8 x7 : ffff0820ac0da058 x6 : ffff0820a8490344\\n[ 3078.396356] x5 : 0000000000000140 x4 : 0000000000000003 x3 : ffff08209cd76938\\n[ 3078.405365] x2 : 0000000000000000 x1 : 0000000000000010 x0 : ffff0820abfe38a0\\n[ 3078.414657] Call trace:\\n[ 3078.418517]  napi_enable+0x80/0x84\\n[ 3078.424626]  hns3_reset_notify_up_enet+0x78/0xd0 [hns3]\\n[ 3078.433469]  hns3_reset_notify+0x64/0x80 [hns3]\\n[ 3078.441430]  hclge_notify_client+0x68/0xb0 [hclge]\\n[ 3078.450511]  hclge_reset_rebuild+0x524/0x884 [hclge]\\n[ 3078.458879]  hclge_reset_service_task+0x3c4/0x680 [hclge]\\n[ 3078.467470]  hclge_service_task+0xb0/0xb54 [hclge]\\n[ 3078.475675]  process_one_work+0x1dc/0x48c\\n[ 3078.481888]  worker_thread+0x15c/0x464\\n[ 3078.487104]  kthread+0x160/0x170\\n[ 3078.492479]  ret_from_fork+0x10/0x18\\n[ 3078.498785] Code: c8027c81 35ffffa2 d50323bf d65f03c0 (d4210000)\\n[ 3078.506889] ---[ end trace 8ebe0340a1b0fb44 ]---\\n\\nOnce hns3_nic_net_open() is excute success, the flag\\nHNS3_NIC_STATE_DOWN will be cleared. So add checking for this\\nflag, directly return when HNS3_NIC_STATE_DOWN is no set.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.151\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.71\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.10\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"5.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:47:40.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47400\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:47:40.000Z\", \"dateReserved\": \"2024-05-21T14:58:30.816Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:03:55.368Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.