SB2026072172 - Out-of-bounds read in Linux kernel hw ionic driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-53371)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39
• https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd
• https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c