Information disclosure in Linux kernel - CVE-2021-47305
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91340
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47305
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to information disclosure within the sync_file_merge() function in drivers/dma-buf/sync_file.c. A local user can gain access to sensitive information.
How to mitigate CVE-2021-47305
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/19f51c2529339280d2c8c6427cd3e21ddf1ac3f8
- https://git.kernel.org/stable/c/e0355a0ad31a1d677b2a4514206de4902bd550e8
- https://git.kernel.org/stable/c/41f45e91c92c8480242ea448d54e28c753b13902
- https://git.kernel.org/stable/c/0d514185ae792d3a1903c8e1a83899aa996705ce
- https://git.kernel.org/stable/c/19edcd97727aae9362444a859a24d99a8730cb27
- https://git.kernel.org/stable/c/ffe000217c5068c5da07ccb1c0f8cce7ad767435
- 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-5.10.53
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.135