ghsa-486r-g5rc-cq67
Vulnerability from github
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: 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 $DEVICE > /sys/bus/pci/drivers/igc/bind
{
"affected": [],
"aliases": [
"CVE-2025-39956"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-09T10:15:36Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: don\u0027t fail igc_probe() on LED setup error\n\nWhen igc_led_setup() fails, igc_probe() fails and triggers kernel panic\nin free_netdev() since unregister_netdev() is not called. [1]\nThis behavior can be tested using fault-injection framework, especially\nthe failslab feature. [2]\n\nSince LED support is not mandatory, treat LED setup failures as\nnon-fatal and continue probe with a warning message, consequently\navoiding the kernel panic.\n\n[1]\n kernel BUG at net/core/dev.c:12047!\n Oops: invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e Not tainted 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n RIP: 0010:free_netdev+0x278/0x2b0\n [...]\n Call Trace:\n \u003cTASK\u003e\n igc_probe+0x370/0x910\n local_pci_probe+0x3a/0x80\n pci_device_probe+0xd1/0x200\n [...]\n\n[2]\n #!/bin/bash -ex\n\n FAILSLAB_PATH=/sys/kernel/debug/failslab/\n DEVICE=0000:00:05.0\n START_ADDR=$(grep \" igc_led_setup\" /proc/kallsyms \\\n | awk \u0027{printf(\"0x%s\", $1)}\u0027)\n END_ADDR=$(printf \"0x%x\" $((START_ADDR + 0x100)))\n\n echo $START_ADDR \u003e $FAILSLAB_PATH/require-start\n echo $END_ADDR \u003e $FAILSLAB_PATH/require-end\n echo 1 \u003e $FAILSLAB_PATH/times\n echo 100 \u003e $FAILSLAB_PATH/probability\n echo N \u003e $FAILSLAB_PATH/ignore-gfp-wait\n\n echo $DEVICE \u003e /sys/bus/pci/drivers/igc/bind",
"id": "GHSA-486r-g5rc-cq67",
"modified": "2025-10-09T12:30:18Z",
"published": "2025-10-09T12:30:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39956"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/528eb4e19ec0df30d0c9ae4074ce945667dde919"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bec504867acc7315de9cd96ef9161fa52a25abe8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f05e82d8553232cef150a6dbb70ed67d162abb2b"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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