#VU90094 Use-after-free in Linux kernel - CVE-2021-47280
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90094
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-2021-47280
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 drm_getunique() function in drivers/gpu/drm/drm_ioctl.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/17dab9326ff263c62dab1dbac4492e2938a049e4
- https://git.kernel.org/stable/c/7d233ba700ceb593905ea82b42dadb4ec8ef85e9
- https://git.kernel.org/stable/c/b246b4c70c1250e7814f409b243000f9c0bf79a3
- https://git.kernel.org/stable/c/491d52e0078860b33b6c14f0a7ac74ca1b603bd6
- https://git.kernel.org/stable/c/f773f8cccac13c7e7bbd9182e7996c727742488e
- https://git.kernel.org/stable/c/b436acd1cf7fac0ba987abd22955d98025c80c2b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.237
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.195
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.44
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.126