CVE-2024-26698 (GCVE-0-2024-26698)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:54 – Updated: 2025-05-04 08:54
VLAI?
Title
hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove
Summary
In the Linux kernel, the following vulnerability has been resolved: hv_netvsc: Fix race condition between netvsc_probe and netvsc_remove In commit ac5047671758 ("hv_netvsc: Disable NAPI before closing the VMBus channel"), napi_disable was getting called for all channels, including all subchannels without confirming if they are enabled or not. This caused hv_netvsc getting hung at napi_disable, when netvsc_probe() has finished running but nvdev->subchan_work has not started yet. netvsc_subchan_work() -> rndis_set_subchannel() has not created the sub-channels and because of that netvsc_sc_open() is not running. netvsc_remove() calls cancel_work_sync(&nvdev->subchan_work), for which netvsc_subchan_work did not run. netif_napi_add() sets the bit NAPI_STATE_SCHED because it ensures NAPI cannot be scheduled. Then netvsc_sc_open() -> napi_enable will clear the NAPIF_STATE_SCHED bit, so it can be scheduled. napi_disable() does the opposite. Now during netvsc_device_remove(), when napi_disable is called for those subchannels, napi_disable gets stuck on infinite msleep. This fix addresses this problem by ensuring that napi_disable() is not getting called for non-enabled NAPI struct. But netif_napi_del() is still necessary for these non-enabled NAPI struct for cleanup purpose. Call trace: [ 654.559417] task:modprobe state:D stack: 0 pid: 2321 ppid: 1091 flags:0x00004002 [ 654.568030] Call Trace: [ 654.571221] <TASK> [ 654.573790] __schedule+0x2d6/0x960 [ 654.577733] schedule+0x69/0xf0 [ 654.581214] schedule_timeout+0x87/0x140 [ 654.585463] ? __bpf_trace_tick_stop+0x20/0x20 [ 654.590291] msleep+0x2d/0x40 [ 654.593625] napi_disable+0x2b/0x80 [ 654.597437] netvsc_device_remove+0x8a/0x1f0 [hv_netvsc] [ 654.603935] rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc] [ 654.611101] ? do_wait_intr+0xb0/0xb0 [ 654.615753] netvsc_remove+0x7c/0x120 [hv_netvsc] [ 654.621675] vmbus_remove+0x27/0x40 [hv_vmbus]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < 9ec807e7b6f5fcf9499f3baa69f254bb239a847f (git)
Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < 7656372ae190e54e8c8cf1039725a5ea59fdf84a (git)
Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < 48a8ccccffbae10c91d31fc872db5c31aba07518 (git)
Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < 22a77c0f5b8233237731df3288d067af51a2fd7b (git)
Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < 0e8875de9dad12805ff66e92cd5edea6a421f1cd (git)
Affected: ac5047671758ad4be9f93898247b3a8b6dfde4c7 , < e0526ec5360a48ad3ab2e26e802b0532302a7e11 (git)
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    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.79 , ≤ 6.1.* (semver)
Unaffected: 6.6.18 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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\"programFiles\": [\"drivers/net/hyperv/netvsc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9ec807e7b6f5fcf9499f3baa69f254bb239a847f\"}, {\"url\": \"https://git.kernel.org/stable/c/7656372ae190e54e8c8cf1039725a5ea59fdf84a\"}, {\"url\": \"https://git.kernel.org/stable/c/48a8ccccffbae10c91d31fc872db5c31aba07518\"}, {\"url\": \"https://git.kernel.org/stable/c/22a77c0f5b8233237731df3288d067af51a2fd7b\"}, {\"url\": \"https://git.kernel.org/stable/c/0e8875de9dad12805ff66e92cd5edea6a421f1cd\"}, {\"url\": \"https://git.kernel.org/stable/c/e0526ec5360a48ad3ab2e26e802b0532302a7e11\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nhv_netvsc: Fix race condition between netvsc_probe and netvsc_remove\\n\\nIn commit ac5047671758 (\\\"hv_netvsc: Disable NAPI before closing the\\nVMBus channel\\\"), napi_disable was getting called for all channels,\\nincluding all subchannels without confirming if they are enabled or not.\\n\\nThis caused hv_netvsc getting hung at napi_disable, when netvsc_probe()\\nhas finished running but nvdev-\u003esubchan_work has not started yet.\\nnetvsc_subchan_work() -\u003e rndis_set_subchannel() has not created the\\nsub-channels and because of that netvsc_sc_open() is not running.\\nnetvsc_remove() calls cancel_work_sync(\u0026nvdev-\u003esubchan_work), for which\\nnetvsc_subchan_work did not run.\\n\\nnetif_napi_add() sets the bit NAPI_STATE_SCHED because it ensures NAPI\\ncannot be scheduled. Then netvsc_sc_open() -\u003e napi_enable will clear the\\nNAPIF_STATE_SCHED bit, so it can be scheduled. napi_disable() does the\\nopposite.\\n\\nNow during netvsc_device_remove(), when napi_disable is called for those\\nsubchannels, napi_disable gets stuck on infinite msleep.\\n\\nThis fix addresses this problem by ensuring that napi_disable() is not\\ngetting called for non-enabled NAPI struct.\\nBut netif_napi_del() is still necessary for these non-enabled NAPI struct\\nfor cleanup purpose.\\n\\nCall trace:\\n[  654.559417] task:modprobe        state:D stack:    0 pid: 2321 ppid:  1091 flags:0x00004002\\n[  654.568030] Call Trace:\\n[  654.571221]  \u003cTASK\u003e\\n[  654.573790]  __schedule+0x2d6/0x960\\n[  654.577733]  schedule+0x69/0xf0\\n[  654.581214]  schedule_timeout+0x87/0x140\\n[  654.585463]  ? __bpf_trace_tick_stop+0x20/0x20\\n[  654.590291]  msleep+0x2d/0x40\\n[  654.593625]  napi_disable+0x2b/0x80\\n[  654.597437]  netvsc_device_remove+0x8a/0x1f0 [hv_netvsc]\\n[  654.603935]  rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc]\\n[  654.611101]  ? do_wait_intr+0xb0/0xb0\\n[  654.615753]  netvsc_remove+0x7c/0x120 [hv_netvsc]\\n[  654.621675]  vmbus_remove+0x27/0x40 [hv_vmbus]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.79\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.18\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.6\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"5.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:54:20.211Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26698\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:54:20.211Z\", \"dateReserved\": \"2024-02-19T14:20:24.157Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-03T14:54:58.577Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.