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In the Linux kernel, the following vulnerability has been resolved:
drm/bridge: megachips: Fix a null pointer dereference bug
When removing the module we will get the following warning:
[ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0
The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized.
Fix this by checking whether both the bridges are probed.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-hwe-5.15Upgrade linux-gcpUpgrade linux-realtimeUpgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-raspi-5.4Upgrade linux-nvidiaUpgrade linux-gkeopUpgrade linux-intel-iotgUpgrade linux-oracle-5.15Upgrade linux-aws-fipsUpgrade linux-gcp-fipsUpgrade linux-gkeUpgrade linux-azureUpgrade linux-lowlatency-hwe-5.15Upgrade linux-hwe-5.4Upgrade linux-azure-5.4Upgrade linux-oracleUpgrade linux-azure-fdeUpgrade linux-xilinx-zynqmpUpgrade linux-bluefieldUpgrade linux-kvmUpgrade linux-fipsUpgrade linux-aws-hweUpgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-ibm-5.4Upgrade linux-gcp-4.15Upgrade linux-aws-5.4Upgrade linux-lowlatencyUpgrade linux-hweUpgrade linux-raspiUpgrade linux-iotUpgrade linux-awsUpgrade linux-azure-fipsUpgrade linuxUpgrade linux-aws-5.15Upgrade linux-oracle-5.4Upgrade linux-azure-4.15Upgrade linux-gcp-5.4 | Sep 19, 2025 | Sep 16, 2025 |
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