GHSA-WCP7-J68J-J6MV
Vulnerability from github – Published: 2026-07-19 09:31 – Updated: 2026-07-29 18:31In the Linux kernel, the following vulnerability has been resolved:
RDMA/ionic: bound node_desc sysfs read with %.64s
node_desc[64] in struct ib_device is not guaranteed to be NUL- terminated. The core IB sysfs handler uses "%.64s" for exactly this reason (drivers/infiniband/core/sysfs.c:1307), since node_desc_store() performs a raw memcpy of up to IB_DEVICE_NODE_DESC_MAX bytes with no NUL termination:
memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));
If exactly 64 bytes are written via the node_desc sysfs file, the array contains no NUL byte. The ionic hca_type_show() handler uses unbounded "%s" and will read past the end of node_desc into adjacent fields of struct ib_device until it encounters a NUL.
ionic supports IB_DEVICE_MODIFY_NODE_DESC, so this is triggerable by userspace.
Match the core handler and bound the format specifier.
{
"affected": [],
"aliases": [
"CVE-2026-53371"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T09:17:02Z",
"severity": "MODERATE"
},
"details": "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 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.",
"id": "GHSA-wcp7-j68j-j6mv",
"modified": "2026-07-29T18:31:31Z",
"published": "2026-07-19T09:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53371"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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