Out-of-bounds read in Linux kernel - CVE-2026-43006
Published: May 2, 2026
Vulnerability identifier: #VU128904
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43006
CWE-ID: CWE-125
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 disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in io_import_fixed() when processing a zero-length fixed buffer import. A local user can submit a specially crafted io_uring request to disclose sensitive information.
The issue is triggered when the buffer address is accepted at the exact end of a registered region with a zero length.
How to mitigate CVE-2026-43006
Install security update from vendor's repository.