SB20240531146 - Use-after-free in Linux kernel init
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531146
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47118)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the kernel_init_freeable() function in init/main.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/764c2e892d1fe895392aff62fb353fdce43bb529
- https://git.kernel.org/stable/c/f86c80515a8a3703e0ca2e56deb50fc2879c5ea4
- https://git.kernel.org/stable/c/4dbd8808a591b49b717862e6e0081bcf14a87788
- https://git.kernel.org/stable/c/d106f05432e60f9f62d456ef017687f5c73cb414
- https://git.kernel.org/stable/c/2cd6eedfa6344f5ef5c3dac3aee57a39b5b46dff
- https://git.kernel.org/stable/c/7178be006d495ffb741c329012da289b62dddfe6
- https://git.kernel.org/stable/c/b8ff869f20152fbe66b6c2e2715d26a2f9897cca
- https://git.kernel.org/stable/c/0711f0d7050b9e07c44bc159bbc64ac0a1022c7f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.236
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.194
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.272
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.272
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125