{"id":"CVE-2026-53371","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: bound node_desc sysfs read with %.64s\n\nnode_desc[64] in struct ib_device is not guaranteed to be NUL-\nterminated","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: bound node_desc sysfs read with %.64s\n\nnode_desc[64] in struct ib_device is not guaranteed to be NUL-\nterminated. The core IB sysfs handler uses \"%.64s\" for…","severity":"none","published":"2026-07-19","updated":"2026-07-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53371","references":[{"url":"https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00124,"epssPercentile":0.02439,"ingestedAt":"2026-07-19T14:31:07.434Z","slug":"CVE-2026-53371","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: bound node_desc sysfs read with %.64s\n\nnode_desc[64] in struct ib_device is not guaranteed to be NUL-\nterminated. The core IB sysfs handler uses \"%.64s\" for exactly this\nreason (drivers/infiniband/core/sysfs.c:1307), since node_desc_store()\nperforms a raw memcpy of up to IB_DEVICE_NODE_DESC_MAX bytes with no NUL\ntermination:\n\n  memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));\n\nIf exactly 64 bytes are written via the node_desc sysfs file, the array\ncontains no NUL byte. The ionic hca_type_show() handler uses unbounded\n\"%s\" and will read past the end of node_desc into adjacent fields of\nstruct ib_device until it encounters a NUL.\n\nionic supports IB_DEVICE_MODIFY_NODE_DESC, so this is triggerable by\nuserspace.\n\nMatch the core handler and bound the format specifier.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}