Improper access control in Linux kernel - CVE-2026-53090
Published: June 25, 2026
Vulnerability identifier: #VU135212
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53090
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to bypass BPF verifier checks.
The vulnerability exists due to improper access control in the Linux kernel BPF verifier when analyzing ld_{abs,ind} instructions in subprograms. A local user can load a crafted BPF program to bypass BPF verifier checks.
The issue affects subprograms where ld_{abs,ind} instructions are permitted, including cases involving BTF-annotated subprograms with scalar return types.
How to mitigate CVE-2026-53090
Install security update from vendor's repository.