Memory leak in Linux kernel - CVE-2023-52909
Published: August 21, 2024 / Updated: May 12, 2025
Vulnerability identifier: #VU96325
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-2023-52909
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 nfs4_get_vfs_file() function in fs/nfsd/nfs4state.c, within the nfsd_file_is_cached(), nfserrno(), put_cred(), nfsd_file_acquire_gc() and nfsd_file_acquire() functions in fs/nfsd/filecache.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-52909
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/45c08a752982116f3287afcd1bd9c50f4fab0c28
- https://git.kernel.org/stable/c/0b778361998d6c6356b8d2fc7ddf025fb3224654
- https://git.kernel.org/stable/c/973acfdfe90c8a4e58ade97ff0653a498531ff2e
- https://git.kernel.org/stable/c/0b3a551fa58b4da941efeb209b3770868e2eddd7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.220
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.154
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2