Memory leak in Linux kernel - CVE-2021-47190
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90006
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47190
CWE-ID: CWE-401
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 perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the perf_env__insert_bpf_prog_info() function in tools/perf/util/env.h, within the perf_env__fetch_btf() and perf_env__insert_btf() functions in tools/perf/util/bpf-event.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2
- https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc
- https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e
- https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.82
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.162