RDMA/core: Reject unregistering netdevs in ib_get_eth_speed

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98359
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:29 UTC
Updated2026-10-19 10:18:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/core: Reject unregistering netdevs in ib_get_eth_speed ib_device_get_netdev() intentionally returns a referenced net_device even when it is unregistering, so matching and cleanup callers can still find the association. The reference keeps struct net_device allocated, but does not guarantee that the device remains operational. ib_get_eth_speed() uses the returned device operationally by invoking its ethtool callback. Although that call is made under RTNL, the function does not verify the registration state first. An asynchronous RDMA port query can therefore call into a netdev after NETDEV_UNREGISTER and ndo_uninit have completed. Check for NETREG_REGISTERED while holding RTNL and return -ENODEV for a device which is being unregistered. Keeping RTNL across the check and the ethtool operation prevents unregister from starting between them. Keep the speed fallback and warning under RTNL as well, so the warning can safely read netdev->name. Drop the netdev reference before releasing RTNL once all accesses to the device are complete.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001680000 probability, percentile 0.054880000 (date 2026-10-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 be4b44c8b47c67a04c08b1a0aba18006b749ae6a git Not specified
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 45c60ffc79771bad154f224a05753191cf1b37bc git Not specified
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e git Not specified
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 a219459fbd1b2598e63c81a52847eba6c28b72d2 git Not specified
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 5bd42f74ec3b4f4687fb600f367af0828d513b3c git Not specified
CNA Linux Linux affected d41861942fc55c14b6280d9568a0d0112037f065 ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5 git Not specified
CNA Linux Linux affected 4.14 Not specified
CNA Linux Linux unaffected 4.14 semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/be4b44c8b47c67a04c08b1a0aba18006b749ae6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/45c60ffc79771bad154f224a05753191cf1b37bc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5bd42f74ec3b4f4687fb600f367af0828d513b3c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a219459fbd1b2598e63c81a52847eba6c28b72d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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