In the Linux kernel, the following vulnerability has been resolved:
perf/core: Fix unconditional security_locked_down() call
Currently, the lockdown state is queried unconditionally, even though
its result is used only if the PERF_SAMPLE_REGS_INTR bit is set in
attr.sample_type. While that doesn't matter in case of the Lockdown LSM,
it causes trouble with the SELinux's lockdown hook implementation.
SELinux implements the locked_down hook with a check whether the current
task's type has the corresponding "lockdown" class permission
("integrity" or "confidentiality") allowed in the policy. This means
that calling the hook when the access control decision would be ignored
generates a bogus permission check and audit record.
Fix this by checking sample_type first and only calling the hook when
its result would be honored.
References
Configurations
Configuration 1 (hide)
|
History
08 Jan 2025, 17:26
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b - Patch | |
| References | () https://git.kernel.org/stable/c/4348d3b5027bc3ff6336368b6c60605d4ef8e1ce - Patch | |
| References | () https://git.kernel.org/stable/c/b246759284d6a2bc5b6f1009caeeb3abce2ec9ff - Patch | |
| References | () https://git.kernel.org/stable/c/c7b0208ee370b89d20486fae71cd9abb759819c1 - Patch | |
| References | () https://git.kernel.org/stable/c/f5809ca4c311b71bfaba6d13f4e39eab0557895e - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | NVD-CWE-noinfo | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 3.3 |
Information
Published : 2024-02-27 19:04
Updated : 2025-01-08 17:26
NVD link : CVE-2021-46971
Mitre link : CVE-2021-46971
CVE.ORG link : CVE-2021-46971
JSON object : View
Products Affected
linux
- linux_kernel
CWE