Use-after-free in Linux kernel - CVE-2021-47301
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90098
CSH Severity: 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-2021-47301
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 igb_clean_tx_ring() function in drivers/net/ethernet/intel/igb/igb_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/d7367f781e5a9ca5df9082b15b272b55e76931f8
- https://git.kernel.org/stable/c/d3ccb18ed5ac3283c7b31ecc685b499e580d5492
- https://git.kernel.org/stable/c/88e0720133d42d34851c8721cf5f289a50a8710f
- https://git.kernel.org/stable/c/f153664d8e70c11d0371341613651e1130e20240
- https://git.kernel.org/stable/c/8e24c12f2ff6d32fd9f057382f08e748ec97194c
- https://git.kernel.org/stable/c/7b292608db23ccbbfbfa50cdb155d01725d7a52e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.241
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.199
- 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