SB2021031125 - Race condition in Linux kernel block driver
Published: March 11, 2021
Security Bulletin ID
SB2021031125
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2021-20261)
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.