Memory leak in Linux kernel - CVE-2021-47543
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89929
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-2021-47543
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 fetch_kernel_version() function in tools/perf/util/util.c, within the report__browse_hists() function in tools/perf/builtin-report.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/df5990db088d4c7fea9a2f9b8195a7859e1768c4
- https://git.kernel.org/stable/c/ff061b5bda73c4f785b4703eeb0848fd99e5608a
- https://git.kernel.org/stable/c/71e284dcebecb9fd204ff11097469cc547723ad1
- https://git.kernel.org/stable/c/d9fc706108c15f8bc2d4ccccf8e50f74830fabd9
- 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
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.164