Tracker / CVE-2021-47179
CVE-2021-47179
High 7.5
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.
Affected products and versions
| linux | linux_kernel · 4.14.233 → 4.14.235 |
|---|---|
| linux | linux_kernel · 4.19.191 → 4.19.193 |
| linux | linux_kernel · 4.9.269 → 4.9.271 |
| linux | linux_kernel · 5.10.36 → 5.10.42 |
| linux | linux_kernel · 5.12.3 → 5.12.9 |
| linux | linux_kernel · 5.4.118 → 5.4.124 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.