RDMA/core: Validate the passed in fops for ib_get_ucaps()

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Summary

CVECVE-2026-53188
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:36 UTC
Updated2026-06-28 08:16:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/core: Validate the passed in fops for ib_get_ucaps() Sashiko pointed out it is not safe to rely only on the devt because char/block alias so if the user finds a block device with the same dev_t it can masquerade as a ucap cdev fd. Test the f_ops to only accept authentic cdevs.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001730000 probability, percentile 0.070220000 (date 2026-06-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 61e51682816d395307f78ae06d640089054c28ab 96b6e98ff12d50ed5817230c6f1188e1150d225d git Not specified
CNA Linux Linux affected 61e51682816d395307f78ae06d640089054c28ab aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b git Not specified
CNA Linux Linux affected 61e51682816d395307f78ae06d640089054c28ab 4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/96b6e98ff12d50ed5817230c6f1188e1150d225d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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