Vulnerability Details CVE-2021-47179
In the Linux kernel, the following vulnerability has been resolved:
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Commit de144ff4234f changes _pnfs_return_layout() to call
pnfs_mark_matching_lsegs_return() passing NULL as the struct
pnfs_layout_range argument. Unfortunately,
pnfs_mark_matching_lsegs_return() doesn't check if we have a value here
before dereferencing it, causing an oops.
I'm able to hit this crash consistently when running connectathon basic
tests on NFS v4.1/v4.2 against Ontap.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.6%
CVSS Severity
CVSS v3 Score 5.5
References
- https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494
- https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48
- https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42
- https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb
- https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb
- https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a
- https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53
- https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494
- https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48
- https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42
- https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb
- https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb
- https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a
- https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53
Products affected by CVE-2021-47179
-
cpe:2.3:o:linux:linux_kernel:4.14.233
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cpe:2.3:o:linux:linux_kernel:4.14.234
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cpe:2.3:o:linux:linux_kernel:4.19.191
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cpe:2.3:o:linux:linux_kernel:4.19.192
-
cpe:2.3:o:linux:linux_kernel:4.9.269
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cpe:2.3:o:linux:linux_kernel:4.9.270
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cpe:2.3:o:linux:linux_kernel:5.10.36
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cpe:2.3:o:linux:linux_kernel:5.10.37
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cpe:2.3:o:linux:linux_kernel:5.10.38
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cpe:2.3:o:linux:linux_kernel:5.10.39
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cpe:2.3:o:linux:linux_kernel:5.10.40
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cpe:2.3:o:linux:linux_kernel:5.10.41
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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:5.4.118
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cpe:2.3:o:linux:linux_kernel:5.4.119
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cpe:2.3:o:linux:linux_kernel:5.4.120
-
cpe:2.3:o:linux:linux_kernel:5.4.121
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cpe:2.3:o:linux:linux_kernel:5.4.122
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cpe:2.3:o:linux:linux_kernel:5.4.123