RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89506
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:32 UTC
Updated2026-09-11 20:19:32 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR The original commit missed that three drivers (mthca, irdma, siw) have UHW data associated with reg_mr that cannot be passed through the ioctl. They also assume that the udata cannot be NULL, so failing to pass a valid udata can trigger a NULL udata crash in those drivers. This never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex() does not accept a udata and those three drivers don't use it, however a malicious userspace could trigger it.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5b2e45049dc06a876bc6b138218ddeb0814502ef 71d5c41ac583df09a7c32199bef7d42de7267d07 git Not specified
CNA Linux Linux affected 5b2e45049dc06a876bc6b138218ddeb0814502ef 9e71d0f4944ba5641e01db29b3256c963656d671 git Not specified
CNA Linux Linux affected 5b2e45049dc06a876bc6b138218ddeb0814502ef 011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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