CVE-2022-48908
Description
In the Linux kernel, the following vulnerability has been resolved: net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe() During driver initialization, the pointer of card info, i.e. the variable 'ci' is required. However, the definition of 'com20020pci_id_table' reveals that this field is empty for some devices, which will cause null pointer dereference when initializing these devices. The following log reveals it: [ 3.973806] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 3.973819] RIP: 0010:com20020pci_probe+0x18d/0x13e0 [com20020_pci] [ 3.975181] Call Trace: [ 3.976208] local_pci_probe+0x13f/0x210 [ 3.977248] pci_device_probe+0x34c/0x6d0 [ 3.977255] ? pci_uevent+0x470/0x470 [ 3.978265] really_probe+0x24c/0x8d0 [ 3.978273] __driver_probe_device+0x1b3/0x280 [ 3.979288] driver_probe_device+0x50/0x370 Fix this by checking whether the 'ci' is a null pointer first.
How to fix
- linux linux_kernel4.9.305, 4.14.270, 4.19.233, 5.4.183, 5.10.104, 5.15.27, 5.16.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.18 ≤ v < 4.9.305, 4.10 ≤ v < 4.14.270, 4.15 ≤ v < 4.19.233, 4.20 ≤ v < 5.4.183, 5.5 ≤ v < 5.10.104, 5.11 ≤ v < 5.15.27, 5.16 ≤ v < 5.16.13, 5.17 | 4.9.305, 4.14.270, 4.19.233, 5.4.183, 5.10.104, 5.15.27, 5.16.13 |
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