Improper access control in Linux kernel - CVE-2026-53095
Published: June 25, 2026
Vulnerability identifier: #VU135218
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-2026-53095
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 modify kernel function arguments.
The vulnerability exists due to improper access control in the BPF kprobe and freplace program attachment logic when attaching a freplace program to a kprobe program with mismatched kprobe_write_ctx values. A local user can attach a crafted freplace program to a kprobe program to modify struct pt_regs and modify kernel function arguments.
This issue arises because uprobe programs use the KPROBE program type, enabling abuse of kprobe_write_ctx through the kprobe+freplace combination.
How to mitigate CVE-2026-53095
Install security update from vendor's repository.