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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-47179
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-47179
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 13 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-47179
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2024-05-16 |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
N/A
|
N/A
|
RedHat-CVE-2021-47179 | 2024-03-25 |
CWE ids for CVE-2021-47179
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-47179
-
https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() - kernel/git/stable/linux.git - Linux kernel stable treePatch
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