Buffer overflow in Linux kernel - CVE-2021-47536
Published: June 5, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91195
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47536
CWE-ID: CWE-119
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 escalate privileges on the system.
The vulnerability exists due to memory corruption within the smc_lgr_unregister_conn() function in net/smc/smc_core.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/77731fede297a23d26f2d169b4269466b2c82529
- https://git.kernel.org/stable/c/95518fe354d712dca6f431cf2a11b8f63bc9a66c
- https://git.kernel.org/stable/c/789b6cc2a5f9123b9c549b886fdc47c865cfe0ba
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.84
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16