CVE-2021-47504

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47504
In the Linux kernel, the following vulnerability has been resolved: io_uring: ensure task_work gets run as part of cancelations If we successfully cancel a work item but that work item needs to be processed through task_work, then we can be sleeping uninterruptibly in io_uring_cancel_generic() and never process it. Hence we don't make forward progress and we end up with an uninterruptible sleep warning. While in there, correct a comment that should be IFF, not IIF.

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/78a780602075d8b00c98070fa26e389b3b3efa72 Patch
https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 Patch
https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72 Patch
https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
History

29 Sep 2025, 16:31

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72 - () https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72 - Patch
References () https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 - () https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 - Patch
CWE NVD-CWE-noinfo
CPE cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux

21 Nov 2024, 06:36

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72 - () https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72 -
References () https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 - () https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: garantiza que task_work se ejecute como parte de las cancelaciones. Si cancelamos con éxito un elemento de trabajo pero ese elemento de trabajo debe procesarse a través de task_work, entonces podemos estar durmiendo ininterrumpidamente en io_uring_cancel_generic() y nunca procesarlo. Por lo tanto, no avanzamos y terminamos con un aviso de sueño ininterrumpido. Mientras esté allí, corrija un comentario que debería ser IFF, no IIF.

24 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-24 15:15

Updated : 2025-09-29 16:31

NVD link : CVE-2021-47504

Mitre link : CVE-2021-47504

CVE.ORG link : CVE-2021-47504

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo