Improper input validation in Linux kernel - CVE-2026-89481
Published: September 12, 2026
Vulnerability identifier: #VU149331
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89481
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper input validation in nvme_tcp_handle_r2t() when processing an R2T request for a read command. A remote attacker can send an R2T request for a read command to disclose sensitive information.
The disclosed read destination buffer may contain stale kernel data.
Affected software
Linux kernel
How to mitigate CVE-2026-89481
Install security update from vendor's repository.