CVE-2021-47456

Summary

In the Linux kernel, the following vulnerability has been resolved:

can: peak_pci: peak_pci_remove(): fix UAF

When remove the module peek_pci, referencing 'chan' again after releasing 'dev' will cause UAF.

Fix this by releasing 'dev' later.

The following log reveals it:

[ 35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci] [ 35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537 [ 35.965513 ] Call Trace: [ 35.965718 ] dump_stack_lvl+0xa8/0xd1 [ 35.966028 ] print_address_description+0x87/0x3b0 [ 35.966420 ] kasan_report+0x172/0x1c0 [ 35.966725 ] ? peak_pci_remove+0x16f/0x270 [peak_pci] [ 35.967137 ] ? trace_irq_enable_rcuidle+0x10/0x170 [ 35.967529 ] ? peak_pci_remove+0x16f/0x270 [peak_pci] [ 35.967945 ] __asan_report_load8_noabort+0x14/0x20 [ 35.968346 ] peak_pci_remove+0x16f/0x270 [peak_pci] [ 35.968752 ] pci_device_remove+0xa9/0x250

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 1c616528ba4aeb1125a06b407572ab7b56acae38affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 447d44cd2f67a20b596ede3ca3cd67086dfd9ca9affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 34914971bb3244db4ce2be44e9438a9b30c56250affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < adbda14730aacce41c0d3596415aa39ad63eafd9affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 1248582e47a9f7ce0ecd156c39fc61f8b6aa3699affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 28f28e4bc3a5e0051faa963f10b778ab38c1db69affected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 0e5afdc2315b0737edcf55bede4ee1640d2d464daffected
LinuxLinuxe6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd < 949fe9b35570361bc6ee2652f89a0561b26eec98affected
LinuxLinux3.4affected
LinuxLinux0 < 3.4unaffected
LinuxLinux4.4.290 <= 4.4.*unaffected
LinuxLinux4.9.288 <= 4.9.*unaffected
LinuxLinux4.14.253 <= 4.14.*unaffected
LinuxLinux4.19.214 <= 4.19.*unaffected
LinuxLinux5.4.156 <= 5.4.*unaffected
LinuxLinux5.10.76 <= 5.10.*unaffected
LinuxLinux5.14.15 <= 5.14.*unaffected
LinuxLinux5.15 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References