Improper input validation in Linux kernel - CVE-2026-43010
Published: May 2, 2026
Vulnerability identifier: #VU128908
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-43010
CWE-ID: CWE-20
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 cause a denial of service.
The vulnerability exists due to improper input validation in bpf_kprobe_multi_link_attach() when attaching a sleepable kprobe_multi program. A local user can attach a sleepable program that invokes sleepable helpers from a non-sleepable context to cause a denial of service.
The issue is triggered because kprobe.multi programs run in atomic/RCU context and cannot sleep.
How to mitigate CVE-2026-43010
Install security update from vendor's repository.