NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Summary
| CVE | CVE-2021-47179 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2024-03-25 10:15:09 UTC |
| Updated | 2026-08-04 10:16:50 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-476
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 80e34f4957ec3010c85f9bb0b568a8d46acdf535 4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 git | Not specified |
| CNA | Linux | Linux | affected 7b7b9774643220e53eef58c15bb29bd4182fe053 42637ca25c7d7b5a92804a679af5192e8c1a9f48 git | Not specified |
| CNA | Linux | Linux | affected 9ffa7967f9379a0a1b924e9ffeda709d72237da7 39785761feadf261bc5101372b0b0bbaf6a94494 git | Not specified |
| CNA | Linux | Linux | affected 6be0e4b59314e4a836495f6ffdc5d2c5b079deeb aba3c7795f51717ae316f3566442dee7cc3eeccb git | Not specified |
| CNA | Linux | Linux | affected 2fafe7d5047f98791afd9a1d90d2afb70debc590 f9890652185b72b8de9ebeb4406037640b6e1b53 git | Not specified |
| CNA | Linux | Linux | affected 7e65ea887d0c0997f3053acd91a027af45e71c5b b090d110e66636bca473fd8b98d5c97b555a965a git | Not specified |
| CNA | Linux | Linux | affected de144ff4234f935bd2150108019b5d87a90a8a96 a421d218603ffa822a0b8045055c03eae394a7eb git | Not specified |
| CNA | Linux | Linux | affected 96260bde1ea8ae31a5402fe506abbb8951d5a42c git | Not specified |
| CNA | Linux | Linux | affected 5.11.20 5.12 semver | Not specified |
| CNA | Linux | Linux | affected 4.9.269 4.9.271 semver | Not specified |
| CNA | Linux | Linux | affected 4.14.233 4.14.235 semver | Not specified |
| CNA | Linux | Linux | affected 4.19.191 4.19.193 semver | Not specified |
| CNA | Linux | Linux | affected 5.4.118 5.4.124 semver | Not specified |
| CNA | Linux | Linux | affected 5.10.36 5.10.42 semver | Not specified |
| CNA | Linux | Linux | affected 5.12.3 5.12.9 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.