Use-after-free in Linux kernel - CVE-2021-46973
Published: June 4, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91071
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-2021-46973
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 qcom_mhi_qrtr_send() function in net/qrtr/mhi.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/48ec949ac979b4b42d740f67b6177797af834f80
- https://git.kernel.org/stable/c/ea474054c2cc6e1284604b21361f475c7cc8c0a0
- https://git.kernel.org/stable/c/03c649dee8b1eb5600212a249542a70f47a5ab40
- https://git.kernel.org/stable/c/47a017f33943278570c072bc71681809b2567b3a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.35
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13