CVE-2026-53371

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> RDMA/ionic: bound node_desc sysfs read with %.64s<br /> <br /> node_desc[64] in struct ib_device is not guaranteed to be NUL-<br /> terminated. The core IB sysfs handler uses "%.64s" for exactly this<br /> reason (drivers/infiniband/core/sysfs.c:1307), since node_desc_store()<br /> performs a raw memcpy of up to IB_DEVICE_NODE_DESC_MAX bytes with no NUL<br /> termination:<br /> <br /> memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));<br /> <br /> If exactly 64 bytes are written via the node_desc sysfs file, the array<br /> contains no NUL byte. The ionic hca_type_show() handler uses unbounded<br /> "%s" and will read past the end of node_desc into adjacent fields of<br /> struct ib_device until it encounters a NUL.<br /> <br /> ionic supports IB_DEVICE_MODIFY_NODE_DESC, so this is triggerable by<br /> userspace.<br /> <br /> Match the core handler and bound the format specifier.