Vulnerability Details CVE-2021-47427
In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi: Fix iscsi_task use after free
Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn")
added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but
then also changed the handling of the case where we detect an already
completed task where we now end up doing a goto to the common put/cleanup
code. This results in a iscsi_task use after free, because the common
cleanup code will do a put on the iscsi_task.
This reverts the goto and moves the iscsi_get_conn() to after we've checked
if the iscsi_task is valid.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 4.2%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2021-47427
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cpe:2.3:o:linux:linux_kernel:5.14
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cpe:2.3:o:linux:linux_kernel:5.14.1
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cpe:2.3:o:linux:linux_kernel:5.14.10
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cpe:2.3:o:linux:linux_kernel:5.14.11
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cpe:2.3:o:linux:linux_kernel:5.14.2
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cpe:2.3:o:linux:linux_kernel:5.14.3
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cpe:2.3:o:linux:linux_kernel:5.14.4
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cpe:2.3:o:linux:linux_kernel:5.14.5
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cpe:2.3:o:linux:linux_kernel:5.14.6
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cpe:2.3:o:linux:linux_kernel:5.14.7
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cpe:2.3:o:linux:linux_kernel:5.14.8
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cpe:2.3:o:linux:linux_kernel:5.14.9
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cpe:2.3:o:linux:linux_kernel:5.15