Out-of-bounds read in Linux kernel - CVE-2021-47039
Published: June 4, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91103
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47039
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the do_format() function in drivers/block/ataflop.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/07f86aa8f4fe077be1b018cc177eb8c6573e5671
- https://git.kernel.org/stable/c/2a3a8bbca28b899806844c00d49ed1b7ccb50957
- https://git.kernel.org/stable/c/1ffec389a6431782a8a28805830b6fae9bf00af1
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13