Integer underflow in Linux kernel - CVE-2021-47563
Published: June 10, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91665
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47563
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the ice_prepare_xdp_rings() and ice_xdp_setup_prog() functions in drivers/net/ethernet/intel/ice/ice_main.c. A local user can execute arbitrary code.
How to mitigate CVE-2021-47563
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1
- https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76
- https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16