#VU90099 Use-after-free in Linux kernel - CVE-2021-47302
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90099
Vulnerability risk: Low
CVSSv4.0: 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-2021-47302
CWE-ID: CWE-416
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the igc_clean_tx_ring() function in drivers/net/ethernet/intel/igc/igc_main.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/a9508e0edfe369ac95d0825bcdca976436ce780f
- https://git.kernel.org/stable/c/e15f629036bac005fc758b4ad17896cf2312add4
- https://git.kernel.org/stable/c/ea5e36b7367ea0a36ef73a163768f16d2977bd83
- https://git.kernel.org/stable/c/56ea7ed103b46970e171eb1c95916f393d64eeff
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.136