Memory leak in Linux kernel - CVE-2025-21768
Published: February 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104939
CSH Severity: Low
CVSS v4.0: 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-2025-21768
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the seg6_output_core() function in net/ipv6/seg6_iptunnel.c, within the rpl_output() function in net/ipv6/rpl_iptunnel.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21768
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/4c0f200c7d06fedddde82209c099014d63f4a6c0
- https://git.kernel.org/stable/c/5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a
- https://git.kernel.org/stable/c/92191dd1073088753821b862b791dcc83e558e07
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14