CVE-2021-47179
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedMar 25, 2024
First seenMar 25, 2024
How to fix
Update
- linux linux_kernel4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.9.269 ≤ v < 4.9.271, 4.14.233 ≤ v < 4.14.235, 4.19.191 ≤ v < 4.19.193, 5.4.118 ≤ v < 5.4.124, 5.10.36 ≤ v < 5.10.42, 5.12.3 ≤ v < 5.12.9 | 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9 |
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