Out-of-bounds read in Linux kernel - CVE-2021-47126
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90339
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-2021-47126
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 ip6_route_info_create() function in net/ipv6/route.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/7ba7fa78a92dc410b6f93ed73075ab669c3a0b59
- https://git.kernel.org/stable/c/09870235827451409ff546b073d754a19fd17e2e
- https://git.kernel.org/stable/c/0a462e25ef0f7ab305081a08d435bbd1f13c0a94
- https://git.kernel.org/stable/c/821bbf79fe46a8b1d18aa456e8ed0a3c208c3754
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125