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
References
Configurations
Configuration 1 (hide)
|
History
03 Feb 2026, 15:17
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/528eb4e19ec0df30d0c9ae4074ce945667dde919 - Patch | |
| References | () https://git.kernel.org/stable/c/bec504867acc7315de9cd96ef9161fa52a25abe8 - Patch | |
| References | () https://git.kernel.org/stable/c/f05e82d8553232cef150a6dbb70ed67d162abb2b - Patch | |
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
Information
Published : 2025-10-09 10:15
Updated : 2026-02-03 15:17
NVD link : CVE-2025-39956
Mitre link : CVE-2025-39956
CVE.ORG link : CVE-2025-39956
JSON object : View
Products Affected
linux
- linux_kernel
CWE