Race condition in Linux kernel - CVE-2021-20261

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Main Vulnerability Database Vulnerabilities #VU91489

Race condition in Linux kernel - CVE-2021-20261

Published: March 11, 2021 / Updated: March 19, 2021


Vulnerability identifier: #VU91489
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-20261
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local privileged user to execute arbitrary code.

The vulnerability exists due to a race condition within the set_fdc(), do_format(), user_reset_fdc(), set_geometry(), get_floppy_geometry(), fd_locked_ioctl(), floppy_check_events() and floppy_revalidate() functions in drivers/block/floppy.c. A local privileged user can execute arbitrary code.


Remediation

Install update from vendor's website.

External links