Numeric Truncation Error in Linux kernel - CVE-2026-93125
Published: September 18, 2026
Vulnerability identifier: #VU150877
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93125
CWE-ID: CWE-197
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass BPF verifier memory-access checks.
The vulnerability exists due to numeric truncation in the BPF verifier's check_kfunc_args() function when processing rdonly_buf_size or rdwr_buf_size kfunc arguments larger than U32_MAX. A local user can load a BPF program that supplies an oversized buffer-size argument to bypass BPF verifier memory-access checks.
Affected software
Linux kernel
How to mitigate CVE-2026-93125
Install security update from vendor's repository.