CVE-2021-47179
NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4: corrige una desreferencia de puntero NULL en pnfs_mark_matching_lsegs_return(). Confirme los cambios de144ff4234f _pnfs_return_layout() para llamar a pnfs_mark_matching_lsegs_return() pasando NULL como argumento de estructura pnfs_layout_range. Desafortunadamente, pnfs_mark_matching_lsegs_return() no verifica si tenemos un valor aquí antes de eliminar la referencia a él, lo que provoca un error. Puedo alcanzar este bloqueo de manera consistente cuando ejecuto pruebas básicas de Connectathon en NFS v4.1/v4.2 contra Ontap.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-03-25 CVE Reserved
- 2024-03-25 CVE Published
- 2024-05-17 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/80e34f4957ec3010c85f9bb0b568a8d46acdf535 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/7b7b9774643220e53eef58c15bb29bd4182fe053 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/9ffa7967f9379a0a1b924e9ffeda709d72237da7 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/6be0e4b59314e4a836495f6ffdc5d2c5b079deeb | Vuln. Introduced | |
| https://git.kernel.org/stable/c/2fafe7d5047f98791afd9a1d90d2afb70debc590 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/7e65ea887d0c0997f3053acd91a027af45e71c5b | Vuln. Introduced | |
| https://git.kernel.org/stable/c/96260bde1ea8ae31a5402fe506abbb8951d5a42c | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.9.269 < 4.9.271 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9.269 < 4.9.271" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.14.233 < 4.14.235 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.14.233 < 4.14.235" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19.191 < 4.19.193 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19.191 < 4.19.193" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.4.118 < 5.4.124 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.118 < 5.4.124" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10.36 < 5.10.42 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.36 < 5.10.42" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.12.3 < 5.12.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12.3 < 5.12.9" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.11.20 Search vendor "Linux" for product "Linux Kernel" and version "5.11.20" | en |
Affected
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