Information disclosure in Linux kernel - CVE-2021-47177
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91366
CSH Severity: Low
CVSSv4.0: 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-2021-47177
CWE-ID: CWE-200
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 gain access to sensitive information.
The vulnerability exists due to information disclosure within the alloc_iommu() function in drivers/iommu/dmar.c. A local user can gain access to sensitive information.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8
- https://git.kernel.org/stable/c/2ec5e9bb6b0560c90d315559c28a99723c80b996
- https://git.kernel.org/stable/c/044bbe8b92ab4e542de7f6c93c88ea65cccd8e29
- https://git.kernel.org/stable/c/f01134321d04f47c718bb41b799bcdeda27873d2
- https://git.kernel.org/stable/c/ca466561eef36d1ec657673e3944eb6340bddb5b
- https://git.kernel.org/stable/c/0ee74d5a48635c848c20f152d0d488bf84641304
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.235
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.193
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.124