CVE-2025-22104

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

ibmvnic: Use kernel helpers for hex dumps

Previously, when the driver was printing hex dumps, the buffer was cast

to an 8 byte long and printed using string formatters. If the buffer

size was not a multiple of 8 then a read buffer overflow was possible.

Therefore, create a new ibmvnic function that loops over a buffer and

calls hex_dump_to_buffer instead.

This patch address KASAN reports like the one below:

ibmvnic 30000003 env3: Login Buffer:

ibmvnic 30000003 env3: 01000000af000000

<...>

ibmvnic 30000003 env3: 2e6d62692e736261

ibmvnic 30000003 env3: 65050003006d6f63

==================================================================

BUG: KASAN: slab-out-of-bounds in ibmvnic_login+0xacc/0xffc [ibmvnic]

Read of size 8 at addr c0000001331a9aa8 by task ip/17681

<...>

Allocated by task 17681:

<...>

ibmvnic_login+0x2f0/0xffc [ibmvnic]

ibmvnic_open+0x148/0x308 [ibmvnic]

__dev_open+0x1ac/0x304

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References