#VU89955 Memory leak in Linux kernel - CVE-2021-47295
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89955
Vulnerability risk: 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-2021-47295
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 tcindex_filter_result_init() and tcindex_partial_destroy_work() functions in net/sched/cls_tcindex.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/8d7924ce85bae64e7a67c366c7c50840f49f3a62
- https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b
- https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1
- https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.136