Out-of-bounds read in Linux kernel - CVE-2021-47244
Published: June 4, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91087
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-2021-47244
CWE-ID: CWE-125
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 an out-of-bounds read error within the mptcp_get_options() function in net/mptcp/options.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/73eeba71dc9932970befa009e68272a3d5ec4a58
- https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037
- https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13