Memory leak in Linux kernel - CVE-2026-89975
Published: September 16, 2026
Vulnerability identifier: #VU150309
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89975
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper memory release in nvmf_parse_options() when parsing malformed DH-CHAP secret options written to /dev/nvme-fabrics. A local user can repeatedly submit malformed dhchap_secret or dhchap_ctrl_secret values to cause a denial of service.
Only systems with CONFIG_NVME_HOST_AUTH enabled are affected. No NVMe-oF target or working transport connection is required.
Affected software
Linux kernel
How to mitigate CVE-2026-89975
Install security update from vendor's repository.