Improper locking in Linux kernel - CVE-2021-47317
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91508
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-2021-47317
CWE-ID: CWE-667
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 improper locking within the PPC_BCC_SHORT() function in arch/powerpc/net/bpf_jit_comp64.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/7284dab07e4d51d453cc42851fae9ec4fac6ef2f
- https://git.kernel.org/stable/c/0d435b6d94b05dcfd836d758a63145aa566618e2
- https://git.kernel.org/stable/c/419ac821766cbdb9fd85872bb3f1a589df05c94c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14