SB20260727256 - Out-of-bounds read in Linux kernel nvme target driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64320)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose sensitive information or cause a denial of service.

The vulnerability exists due to an out-of-bounds heap read in nvmet_execute_disc_get_log_page() in the NVMe target discovery controller when handling a host-supplied log page offset in a Discovery Get Log Page request. A remote attacker can send a specially crafted request with an out-of-range offset to disclose sensitive information or cause a denial of service.

The issue is reachable before authentication by any TCP, RDMA, or FC peer that can reach the nvmet target.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/33b974eb626154ae9348f2bac7de84cb2a3d9dd4
• https://git.kernel.org/stable/c/53cd102a7a56079b11b897835bd9b94c14e6322c
• https://git.kernel.org/stable/c/56c021a0869260d04c4b65d1471936aaf9177114
• https://git.kernel.org/stable/c/a29b316b9bbfd269f323ab4ba9906a894025680f