SB20260916134 - Memory leak in Linux kernel nvme host driver

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-89975)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/15d7a35a489287109b5a7c157d53d9b8214f0318
• https://git.kernel.org/stable/c/702c1ae0d31b44828ec3c87079def490c1ee1fb3
• https://git.kernel.org/stable/c/afdee49a1b88ed9bb44e2b30e855297c169bcc53
• https://git.kernel.org/stable/c/d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549