Input validation error in Linux kernel - CVE-2025-21777
Published: February 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105034
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2025-21777
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the rb_range_buffer(), rb_meta_valid(), rb_meta_init_text_addr() and rb_range_meta_init() functions in kernel/trace/ring_buffer.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2025-21777
Install update from vendor's website.
Linux kernel - addressed in versions 6.12.16, 6.13.4, 6.14
External References
- https://git.kernel.org/stable/c/0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf
- https://git.kernel.org/stable/c/3ec743d558f111d8999aea24577ba66c65ee2eeb
- https://git.kernel.org/stable/c/f5b95f1fa2ef3a03f49eeec658ba97e721412b32
- 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