RDMA/core: Validate the passed in fops for ib_get_ucaps()_CVE-2026-53188

8.8 / 10

HIGH

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

Description

In 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.

AI Analysis

A vulnerability in the Linux kernel's RDMA/core allows an attacker to masquerade as a ucap cdev fd by finding a block device with the same dev_t, potentially leading to high-severity consequences.

Basic Information

ID CVE-2026-53188

Source Linux

Published Jun 25, 2026 at 08:39

Modified Jun 28, 2026 at 06:40

Affected Product

Vendor Linux

Product Linux

Version 61e51682816d395307f78ae06d640089054c28ab

Affected Versions Linux Linux 61e51682816d395307f78ae06d640089054c28ab
Linux Linux 61e51682816d395307f78ae06d640089054c28ab
Linux Linux 61e51682816d395307f78ae06d640089054c28ab
Linux Linux 6.15

AI Assessment

AI Score 8.8 / 10

AI Severity High

Vendor Linux

Product Linux Kernel

Version 6.15, 61e51682816d395307f78ae06d640089054c28ab

References

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    "published": "2026-06-25T08:39:00.960Z",
    "modified": "2026-06-28T06:40:04.206Z",
    "type": "cve",
    "title": "RDMA/core: Validate the passed in fops for ib_get_ucaps()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/96b6e98ff12d50ed5817230c6f1188e1150d225d\nhttps://git.kernel.org/stable/c/aa181287ebdcc53ee0ba5c2f8243e2d541ebc19b\nhttps://git.kernel.org/stable/c/4a1b1ac2744694a2ecd66a84bdb1445f4ef24bee",
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