Description
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled
If the gmac0 is disabled, the precheck for a valid ingress device will
cause a NULL pointer deref and crash the system. This happens because
eth->netdev[0] will be NULL but the code will directly try to access
netdev_ops.
Instead of just checking for the first net_device, it must be checked if
any of the mtk_eth net_devices is matching the netdev_ops of the ingress
device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.11 | 6.12.81 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.19.12-1 | — |
| Debian 13 | linux | 6.12.85-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | linux-nvidia | 7.0.0-1006.6 | — |
| Ubuntu 25.10 | linux +8 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv +26 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kernel-64kb +8 | 6.12.0-160000.34.1 | SUSE-SU-2026:22087-1 |
| SLES for SAP 16.0 | kernel-default-base | 6.12.0-160000.34.1.160000.2.15 | SUSE-SU-2026:22087-1 |
| SLES 16.0 | kernel-64kb +8 | 6.12.0-160000.34.1 | SUSE-SU-2026:22087-1, SUSE-SU-2026:22076-1 |
| SLES 16.0 | kernel-default-base | 6.12.0-160000.34.1.160000.2.15 | SUSE-SU-2026:22087-1 |
| SLE Micro 6.2 | kernel-default-base | 6.12.0-160000.34.1.160000.2.15 | SUSE-SU-2026:22048-1 |
| SLE Micro 6.2 | kernel-rt +5 | 6.12.0-160000.34.1 | SUSE-SU-2026:22048-1, SUSE-SU-2026:22043-1 |
Advisories 5
- WID-SEC-2026-1346 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- SUSE-SU-2026:22043-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jul 9, 2026
- SUSE-SU-2026:22087-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jun 16, 2026
- SUSE-SU-2026:22076-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jun 16, 2026
- SUSE-SU-2026:22048-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Jun 10, 2026