CVE-2021-47360

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

binder: make sure fd closes complete

During BC_FREE_BUFFER processing, the BINDER_TYPE_FDA object cleanup may close 1 or more fds. The close operations are completed using the task work mechanism -- which means the thread needs to return to userspace or the file object may never be dereferenced -- which can lead to hung processes.

Force the binder thread back to userspace if an fd is closed during BC_FREE_BUFFER handling.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-252

Affected software

VendorProductVersions
LinuxLinux>= 80cd795630d6526ba729a089a435bf74a57af927, < aa2c274c279ff365a06a4cba263f04965895166e; >= 80cd795630d6526ba729a089a435bf74a57af927, < d5b0473707fa53b03a5db0256ce62b2874bddbc7; >= 80cd795630d6526ba729a089a435bf74a57af927, < b95483d8d94b41fa31a84c1d86710b7907a37621; >= 80cd795630d6526ba729a089a435bf74a57af927, < 5fdb55c1ac9585eb23bb2541d5819224429e103d; 27564d8d5d12d2ff197055346069c6bdbe08a8c2; >= 4.20.1, < 4.21
LinuxLinux5.0

References

Timeline

Published
May 21, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-47360: Medium severity, CVSS 5.5 | Vulnix