Improper Initialization in Linux kernel - CVE-2026-72028
Published: August 16, 2026
Vulnerability identifier: #VU143574
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72028
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in arch/riscv/kernel/probes/rethook_trampoline.S when handling kretprobe stack access on risc-v systems. A local user can configure a kretprobe that reads a word from the stack to cause a denial of service.
The issue occurs because the original stack pointer is not preserved in the saved register state, which can leave regs->sp with an arbitrary value during stack access.
Affected software
Linux kernel
How to mitigate CVE-2026-72028
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/2faf0198168d2017cb528a79f76c560fda3b6e94
- https://git.kernel.org/stable/c/5da5cf48a432e30ded8d58087854e5383a36eff1
- https://git.kernel.org/stable/c/91b4d76dd07f1a1f20f73dfebb42ba04ac911a56
- https://git.kernel.org/stable/c/bc7b086a45521a986a49045907f017e3e46c763e
- https://git.kernel.org/stable/c/c386e1c591d72eab58ee2e69105c8cbc70928857