Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-98048
Published: September 28, 2026
Vulnerability identifier: #VU152430
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-2026-98048
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect eBPF program behavior.
The vulnerability exists due to improper control flow handling in the BPF verifier fastcall pattern rewrite logic when processing a spill-call-fill instruction sequence entered by a jump. A local user can load an eBPF program containing such a sequence to cause incorrect eBPF program behavior.
Affected software
Linux kernel
How to mitigate CVE-2026-98048
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3