CVE-2022-48908

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < 8e3bc7c5bbf87e86e9cd652ca2a9166942d86206affected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < b1ee6b9340a38bdb9e5c90f0eac5b22b122c3049affected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < b838add93e1dd98210482dc433768daaf752bdefaffected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < e50c589678e50f8d574612e473ca60ef45190896affected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < 5f394102ee27dbf051a4e283390cd8d1759daceaaffected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < ea372aab54903310756217d81610901a8e66cb7daffected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < ca0bdff4249a644f2ca7a49d410d95b8dacf1f72affected
LinuxLinux8c14f9c70327a6fb75534c4c61d7ea9c82ccf78f < bd6f1fd5d33dfe5d1b4f2502d3694a7cc13f166daffected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux4.9.305 <= 4.9.*unaffected
LinuxLinux4.14.270 <= 4.14.*unaffected
LinuxLinux4.19.233 <= 4.19.*unaffected
LinuxLinux5.4.183 <= 5.4.*unaffected
LinuxLinux5.10.104 <= 5.10.*unaffected
LinuxLinux5.15.27 <= 5.15.*unaffected
LinuxLinux5.16.13 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References