Memory leak in Linux kernel - CVE-2023-53669
Published: October 8, 2025 / Updated: October 27, 2025
Vulnerability identifier: #VU116694
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-2023-53669
CWE-ID: CWE-401
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 memory leak within the skb_copy_ubufs() function in net/core/skbuff.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2023-53669
Install update from vendor's repository.
Linux kernel - update to 6.3.3
External References
- https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301
- https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6
- https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910
- https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3