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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

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
First Time		Linux Linux linux Kernel
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:o:linux:linux_kernel:5.16:rc4:::::: 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:::::::: cpe:2.3:o:linux:linux_kernel:5.16:rc3::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
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

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

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