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CVE-2021-47179

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CVE-2021-47179

Published: Mar 25, 2024

Modified: May 23, 2026

PUBLISHED

Description

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.

VendorProductVersions

Linux

Linux

affected
80e34f4957ec3010c85f9bb0b568a8d46acdf535 - < 4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42
affected
7b7b9774643220e53eef58c15bb29bd4182fe053 - < 42637ca25c7d7b5a92804a679af5192e8c1a9f48
affected
9ffa7967f9379a0a1b924e9ffeda709d72237da7 - < 39785761feadf261bc5101372b0b0bbaf6a94494
affected
6be0e4b59314e4a836495f6ffdc5d2c5b079deeb - < aba3c7795f51717ae316f3566442dee7cc3eeccb
affected
2fafe7d5047f98791afd9a1d90d2afb70debc590 - < f9890652185b72b8de9ebeb4406037640b6e1b53

+4 more versions

Linux

Linux

affected
4.9.269 - < 4.9.271
affected
4.14.233 - < 4.14.235
affected
4.19.191 - < 4.19.193
affected
5.4.118 - < 5.4.124
affected
5.10.36 - < 5.10.42

+1 more versions

References

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