#VU90871 Use of uninitialized resource in Linux kernel - CVE-2021-47343
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90871
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47343
CWE-ID: CWE-908
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 perform a denial of service (DoS) attack.
The vulnerability exists due to use of uninitialized resource within the dm_btree_remove() function in drivers/md/persistent-data/dm-btree-remove.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/4c84b3e0728ffe10d89c633694c35a02b5c477dc
- https://git.kernel.org/stable/c/c154775619186781aaf8a99333ac07437a1768d5
- https://git.kernel.org/stable/c/73f27adaa73e3057a9ec464e33c4f54d34ea5de3
- https://git.kernel.org/stable/c/8fbae4a1bdb5b889490cdee929e68540151536e5
- https://git.kernel.org/stable/c/964d57d1962d7e68f0f578f05d9ae4a104d74851
- https://git.kernel.org/stable/c/ba47e65a5de3e0e8270301a409fc63d3129fdb9e
- https://git.kernel.org/stable/c/89bf942314b78d454db92427201421b5dec132d9
- https://git.kernel.org/stable/c/ad365e9351ac2b450e7e79932ff6abf59342d91a
- https://git.kernel.org/stable/c/b6e58b5466b2959f83034bead2e2e1395cca8aeb
- 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