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8.4 High

CVE-2021-47456 In the Linux kernel, the following vulnerability has been resolved: can: peak_pci: peak_pci_remove(): fix UAF When…

Description

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 products and versions

Product Affected versions Fixed in
Linux 5.15 earliest → < 5.15 5.15
Linux 5.14 earliest → < 5.14.15 5.14.15
Linux 5.10 earliest → < 5.10.76 5.10.76
Linux 5.4 earliest → < 5.4.156 5.4.156
Linux 4.19 earliest → < 4.19.214 4.19.214
Linux 4.14 earliest → < 4.14.253 4.14.253
Linux 4.9 earliest → < 4.9.288 4.9.288
Linux 4.4 earliest → < 4.4.290 4.4.290
Linux 3.4 No fix stated
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Product Affected versions Fixed in
linux_kernel 5.15 earliest → < 5.15 5.15

References

Timeline

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