Out-of-bounds read in Linux kernel - CVE-2026-53371
Published: July 21, 2026
Vulnerability identifier: #VU138896
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-2026-53371
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 the ionic hca_type_show() sysfs handler when reading the node_desc sysfs attribute after a 64-byte value has been written without NUL termination. A local user can write an exactly 64-byte value and then read the sysfs file to disclose sensitive information.
The issue is triggerable from userspace because ionic supports IB_DEVICE_MODIFY_NODE_DESC.
How to mitigate CVE-2026-53371
Install security update from vendor's repository.