#VU93604 Buffer overflow in Linux kernel - CVE-2021-47376
Published: July 1, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93604
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-2021-47376
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 perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the check_btf_line() function in kernel/bpf/verifier.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/93937596e0652d50973f9dc944fea1694ac8cdfd
- https://git.kernel.org/stable/c/6345a0bee80139ea00a341c4202ebfd1534b5eb0
- https://git.kernel.org/stable/c/b5fe7cdfee5901ce5513c30e554d51536e003bde
- https://git.kernel.org/stable/c/0e6491b559704da720f6da09dd0a52c4df44c514
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.70
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.150