Vulnerability Details CVE-2021-47198
In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine
An error is detected with the following report when unloading the driver:
"KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b"
The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg_fab_ctrl_node(), but the
flag is not cleared upon completion of the login.
This allows a second call to lpfc_unreg_rpi() to proceed with nlp_rpi set
to LPFC_RPI_ALLOW_ERROR. This results in a use after free access when used
as an rpi_ids array index.
Fix by clearing the NLP_REG_LOGIN_SEND nlp_flag in
lpfc_mbx_cmpl_fc_reg_login().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.8%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2021-47198
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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:5.14.12
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cpe:2.3:o:linux:linux_kernel:5.14.13
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cpe:2.3:o:linux:linux_kernel:5.14.14
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cpe:2.3:o:linux:linux_kernel:5.14.15
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cpe:2.3:o:linux:linux_kernel:5.14.16
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cpe:2.3:o:linux:linux_kernel:5.14.17
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cpe:2.3:o:linux:linux_kernel:5.14.18
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cpe:2.3:o:linux:linux_kernel:5.14.19
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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:5.14.20
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cpe:2.3:o:linux:linux_kernel:5.14.21
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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
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cpe:2.3:o:linux:linux_kernel:5.15.0
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cpe:2.3:o:linux:linux_kernel:5.15.0-58
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cpe:2.3:o:linux:linux_kernel:5.15.1
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cpe:2.3:o:linux:linux_kernel:5.15.2
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cpe:2.3:o:linux:linux_kernel:5.15.3
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cpe:2.3:o:linux:linux_kernel:5.15.4