#VU90133 Use-after-free in Linux kernel - CVE-2021-47355
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90133
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-2021-47355
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 nicstar_cleanup() function in drivers/atm/nicstar.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/99779c9d9ffc7775da6f7fd8a7c93ac61657bed5
- https://git.kernel.org/stable/c/4e2a0848ea2cab0716d46f85a8ccd5fa9a493e51
- https://git.kernel.org/stable/c/c471569632654e57c83512e0fc1ba0dbb4544ad6
- https://git.kernel.org/stable/c/a7a7b2848312cc4c3a42b6e42a8ab2e441857aba
- https://git.kernel.org/stable/c/bdf5334250c69fabf555b7322c75249ea7d5f148
- https://git.kernel.org/stable/c/a7f7c42e31157d1f0871d6a8e1a0b73a6b4ea785
- https://git.kernel.org/stable/c/2f958b6f6ba0854b39be748d21dfe71e0fe6580f
- https://git.kernel.org/stable/c/5b991df8881088448cb223e769e37cab8dd40706
- https://git.kernel.org/stable/c/34e7434ba4e97f4b85c1423a59b2922ba7dff2ea
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.51
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.133