#VU93165 Buffer overflow in Linux kernel - CVE-2021-47004
Published: June 24, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93165
Vulnerability risk: 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-2021-47004
CWE-ID: CWE-119
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 memory corruption within the locate_dirty_segment(), get_free_segment(), __refresh_next_blkoff() and __allocate_new_segment() functions in fs/f2fs/segment.c, within the add_victim_entry() function in fs/f2fs/gc.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/105155a8146ddb54c119d8318964eef3859d109d
- https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63
- https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff
- https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13