Out-of-bounds read in Linux kernel - CVE-2026-89743
Published: September 12, 2026
Vulnerability identifier: #VU149069
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89743
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose kernel heap memory.
The vulnerability exists due to an out-of-bounds read in the NSM response-processing path when processing a response length reported by an NSM device backend that exceeds the response buffer. A local user can trigger processing of an oversized reported response length to disclose kernel heap memory.
Affected software
Linux kernel
How to mitigate CVE-2026-89743
Install security update from vendor's repository.