SB2024082149 - Memory leak in Linux kernel nfsd
Published: August 21, 2024 Updated: May 12, 2025
Security Bulletin ID
SB2024082149
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2023-52909)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 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
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.
Remediation
Install update from vendor's website.
References
- 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