CVE-2021-47179

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494 Patch
https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48 Patch
https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 Patch
https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb Patch
https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb Patch
https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a Patch
https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53 Patch
Configurations

Configuration 1 (hide)

OR 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:*:*:*:*:*:*:*:*
History

16 May 2024, 21:20

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494 - () https://git.kernel.org/stable/c/39785761feadf261bc5101372b0b0bbaf6a94494 - Patch
References () https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48 - () https://git.kernel.org/stable/c/42637ca25c7d7b5a92804a679af5192e8c1a9f48 - Patch
References () https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 - () https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42 - Patch
References () https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb - () https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb - Patch
References () https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb - () https://git.kernel.org/stable/c/aba3c7795f51717ae316f3566442dee7cc3eeccb - Patch
References () https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a - () https://git.kernel.org/stable/c/b090d110e66636bca473fd8b98d5c97b555a965a - Patch
References () https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53 - () https://git.kernel.org/stable/c/f9890652185b72b8de9ebeb4406037640b6e1b53 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-476
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

04 Apr 2024, 14:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/a421d218603ffa822a0b8045055c03eae394a7eb -

25 Mar 2024, 13:47

Type Values Removed Values Added
Summary
  • (es) 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.

25 Mar 2024, 10:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-03-25 10:15

Updated : 2024-05-16 21:20

NVD link : CVE-2021-47179

Mitre link : CVE-2021-47179

CVE.ORG link : CVE-2021-47179

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference