Out-of-bounds read in Linux kernel - CVE-2026-64320
Published: July 27, 2026
Vulnerability identifier: #VU139658
CSH Severity: High
CVSS v4: 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]
CVE-ID: CVE-2026-64320
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-64320
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3