RDMA/ionic: bound node_desc sysfs read with %.64s

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53371
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 09:17:02 UTC
Updated2026-07-19 09:17:02 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.062370000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 61df14f306f153bffa2f3c74a94ff5a85c99fa39 git Not specified
CNA Linux Linux affected 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 a3e9372203afde2c62576356bb9a17890bc7fd6c git Not specified
CNA Linux Linux affected 2075bbe8ef03914aa2211035eec45d1d3a5c4ff2 654a27f25530d052eeedf086e6c3e2d585c203bd git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/654a27f25530d052eeedf086e6c3e2d585c203bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/61df14f306f153bffa2f3c74a94ff5a85c99fa39 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a3e9372203afde2c62576356bb9a17890bc7fd6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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