CVE-2025-39956
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: igc: don't fail igc_probe() on LED setup error When igc_led_setup() fails, igc_probe() fails and triggers kernel panic in free_netdev() since unregister_netdev() is not called. [1] This behavior can be tested using fault-injection framework, especially the failslab feature. [2] Since LED support is not mandatory, treat LED setup failures as non-fatal and continue probe with a warning message, consequently avoiding the kernel panic. [1] kernel BUG at net/core/dev.c:12047! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e Not tainted 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:free_netdev+0x278/0x2b0 [...] Call Trace: <TASK> igc_probe+0x370/0x910 local_pci_probe+0x3a/0x80 pci_device_probe+0xd1/0x200 [...] [2] #!/bin/bash -ex FAILSLAB_PATH=/sys/kernel/debug/failslab/ DEVICE=0000:00:05.0 START_ADDR=$(grep " igc_led_setup" /proc/kallsyms \ | awk '{printf("0x%s", $1)}') END_ADDR=$(printf "0x%x" $((START_ADDR + 0x100))) echo $START_ADDR > $FAILSLAB_PATH/require-start echo $END_ADDR > $FAILSLAB_PATH/require-end echo 1 > $FAILSLAB_PATH/times echo 100 > $FAILSLAB_PATH/probability echo N > $FAILSLAB_PATH/ignore-gfp-wait echo $DEVICE > /sys/bus/pci/drivers/igc/bind
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-09 10:15:36.813000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-39956",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-09T10:15:36.813",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: don't fail igc_probe() on LED setup error\n\nWhen igc_led_setup() fails, igc_probe() fails and triggers kernel panic\nin free_netdev() since unregister_netdev() is not called. [1]\nThis behavior can be tested using fault-injection framework, especially\nthe failslab feature. [2]\n\nSince LED support is not mandatory, treat LED setup failures as\nnon-fatal and continue probe with a warning message, consequently\navoiding the kernel panic.\n\n[1]\n kernel BUG at net/core/dev.c:12047!\n Oops: invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e Not tainted 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n RIP: 0010:free_netdev+0x278/0x2b0\n [...]\n Call Trace:\n <TASK>\n igc_probe+0x370/0x910\n local_pci_probe+0x3a/0x80\n pci_device_probe+0xd1/0x200\n [...]\n\n[2]\n #!/bin/bash -ex\n\n FAILSLAB_PATH=/sys/kernel/debug/failslab/\n DEVICE=0000:00:05.0\n START_ADDR=$(grep \" igc_led_setup\" /proc/kallsyms \\\n | awk '{printf(\"0x%s\", $1)}')\n END_ADDR=$(printf \"0x%x\" $((START_ADDR + 0x100)))\n\n echo $START_ADDR > $FAILSLAB_PATH/require-start\n echo $END_ADDR > $FAILSLAB_PATH/require-end\n echo 1 > $FAILSLAB_PATH/times\n echo 100 > $FAILSLAB_PATH/probability\n echo N > $FAILSLAB_PATH/ignore-gfp-wait\n\n echo $DEVICE > /sys/bus/pci/drivers/igc/bind"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nigc: no fallar igc_probe() en error de configuración de LED\n\nCuando igc_led_setup() falla, igc_probe() falla y dispara un pánico del kernel\nen free_netdev() ya que unregister_netdev() no es llamado. [1]\nEste comportamiento puede ser probado usando el framework de inyección de fallos, especialmente\nla característica failslab. [2]\n\nDado que el soporte de LED no es obligatorio, tratar los fallos de configuración de LED como\nno fatales y continuar la sonda con un mensaje de advertencia, consecuentemente\nevitando el pánico del kernel.\n\n[1]\n BUG del kernel en net/core/dev.c:12047!\n Oops: código de operación inválido: 0000 [#1] SMP NOPTI\n CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e No contaminado 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntario)\n Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n RIP: 0010:free_netdev+0x278/0x2b0\n [...]\n Traza de llamada:\n <TAREA>\n igc_probe+0x370/0x910\n local_pci_probe+0x3a/0x80\n pci_device_probe+0xd1/0x200\n [...]\n\n[2]\n #!/bin/bash -ex\n\n FAILSLAB_PATH=/sys/kernel/debug/failslab/\n DEVICE=0000:00:05.0\n START_ADDR=$(grep “ igc_led_setup” /proc/kallsyms \\\n | awk '{printf(“0x%s”, $1)}')\n END_ADDR=$(printf “0x%x” $((START_ADDR + 0x100)))\n\n echo $START_ADDR > $FAILSLAB_PATH/require-start\n echo $END_ADDR > $FAILSLAB_PATH/require-end\n echo 1 > $FAILSLAB_PATH/times\n echo 100 > $FAILSLAB_PATH/probability\n echo N > $FAILSLAB_PATH/ignore-gfp-wait\n\n echo $DEVICE > /sys/bus/pci/drivers/igc/bind"
}
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{
"source": "[email protected]",
"type": "Primary",
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"ssvcData": {
"timestamp": "2026-10-15T21:55:00.586485Z",
"id": "CVE-2025-39956",
"options": [
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{
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
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}
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"configurations": [
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