Vulnerability Details CVE-2021-47278
In the Linux kernel, the following vulnerability has been resolved:
bus: mhi: pci_generic: Fix possible use-after-free in mhi_pci_remove()
This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.
Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.9%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2021-47278
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cpe:2.3:o:linux:linux_kernel:5.12
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cpe:2.3:o:linux:linux_kernel:5.12.1
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cpe:2.3:o:linux:linux_kernel:5.12.10
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cpe:2.3:o:linux:linux_kernel:5.12.2
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cpe:2.3:o:linux:linux_kernel:5.12.3
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cpe:2.3:o:linux:linux_kernel:5.12.4
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cpe:2.3:o:linux:linux_kernel:5.12.5
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cpe:2.3:o:linux:linux_kernel:5.12.6
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cpe:2.3:o:linux:linux_kernel:5.12.7
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cpe:2.3:o:linux:linux_kernel:5.12.8
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cpe:2.3:o:linux:linux_kernel:5.12.9
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cpe:2.3:o:linux:linux_kernel:5.13