CVE-2025-39956
- Source
- https://cve.org/CVERecord?id=CVE-2025-39956
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39956.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-39956
- Downstream
- Related
- Published
- 2025-10-09T09:47:34.253Z
- Modified
- 2026-03-23T05:12:32.512422324Z
- Summary
- igc: don't fail igc_probe() on LED setup error
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
igc: don't fail igc_probe() on LED setup error
When igcledsetup() fails, igcprobe() fails and triggers kernel panic in freenetdev() 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:freenetdev+0x278/0x2b0 [...] Call Trace: <TASK> igcprobe+0x370/0x910 localpciprobe+0x3a/0x80 pcideviceprobe+0xd1/0x200 [...]
[2] #!/bin/bash -ex
FAILSLABPATH=/sys/kernel/debug/failslab/ DEVICE=0000:00:05.0 STARTADDR=$(grep " igcledsetup" /proc/kallsyms \ | awk '{printf("0x%s", $1)}') ENDADDR=$(printf "0x%x" $((STARTADDR + 0x100)))
echo $STARTADDR > $FAILSLABPATH/require-start echo $ENDADDR > $FAILSLABPATH/require-end echo 1 > $FAILSLABPATH/times echo 100 > $FAILSLABPATH/probability echo N > $FAILSLAB_PATH/ignore-gfp-wait
echo $DEVICE > /sys/bus/pci/drivers/igc/bind
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39956.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/528eb4e19ec0df30d0c9ae4074ce945667dde919
- https://git.kernel.org/stable/c/bec504867acc7315de9cd96ef9161fa52a25abe8
- https://git.kernel.org/stable/c/f05e82d8553232cef150a6dbb70ed67d162abb2b
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39956.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39956
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedea578703b03d5d651b091c39f717dc829155b520Fixedbec504867acc7315de9cd96ef9161fa52a25abe8Fixedf05e82d8553232cef150a6dbb70ed67d162abb2bFixed528eb4e19ec0df30d0c9ae4074ce945667dde919