Improper access control in Linux kernel - CVE-2026-90409
Published: September 18, 2026
Vulnerability identifier: #VU151072
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90409
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to map user-exposed buffer objects into an address-space region reserved for kernel buffer objects.
The vulnerability exists due to improper access control in the Panthor vm_bind ioctl path when processing vm_bind mapping operations. A local user can submit a vm_bind mapping that overlaps the reserved kernel buffer object region to map user-exposed buffer objects into an address-space region reserved for kernel buffer objects.
Affected software
Linux kernel
How to mitigate CVE-2026-90409
Install security update from vendor's repository.