CVE-2026-45923 - Vulnerability Details

- net: usb: catc: enable basic endpoint checking

Description

In the Linux kernel, the following vulnerability has been resolved:

net: usb: catc: enable basic endpoint checking

catc_probe() fills three URBs with hardcoded endpoint pipes without
verifying the endpoint descriptors:

- usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX
- usb_rcvintpipe(usbdev, 2) for interrupt status

A malformed USB device can present these endpoints with transfer types
that differ from what the driver assumes.

Add a catc_usb_ep enum for endpoint numbers, replacing magic constants
throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints()
calls after usb_set_interface() to verify endpoint types before use,
rejecting devices with mismatched descriptors at probe time.

Similar to
- commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking")
which fixed the issue in rtl8150.

Published: 2026-05-27

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< ac7739b78ded519e1d9919a814da3b34120bec8c
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 163d04897e57633c5d2e69734e4e4b22bb63f50d
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< a488001a8197da4f9c413eec8f6acbff71c60145
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 36c28b028efba0f42218d41fed12c47ce217c1f1
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 1a42cfced8900d33d032c7ec338484855b61b8cc
`1da177e4c3f41524e886b7f1b8a0c1fc7321cac2`	affected	< 9e7021d2aeae57c323a6f722ed7915686cdcc123

Linux

affected

Version	Status	Constraints
`2.6.12`	affected	—
`0`	unaffected	< 2.6.12
`5.10.252`	unaffected	≤ 5.10.*
`6.1.165`	unaffected	≤ 6.1.*
`6.6.128`	unaffected	≤ 6.6.*
`6.12.75`	unaffected	≤ 6.12.*
`6.18.14`	unaffected	≤ 6.18.*
`6.19.4`	unaffected	≤ 6.19.*
`7.0`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a488001a8197da4f9c413eec8f6acbff71c60145)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ac7739b78ded519e1d9919a814da3b34120bec8c)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1a42cfced8900d33d032c7ec338484855b61b8cc)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,36c28b028efba0f42218d41fed12c47ce217c1f1)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,9e7021d2aeae57c323a6f722ed7915686cdcc123)`	affected	code_commit	—
`[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,163d04897e57633c5d2e69734e4e4b22bb63f50d)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.12`	affected	semver	—
`[0,2.6.12)`	unaffected	semver	—
`[5.10.252,5.11.0)`	unaffected	semver	—
`[6.1.165,6.2.0)`	unaffected	semver	—
`[6.6.128,6.7.0)`	unaffected	semver	—
`[6.12.75,6.13.0)`	unaffected	semver	—
`[6.18.14,6.19.0)`	unaffected	semver	—
`[6.19.4,6.20.0)`	unaffected	semver	—
`[7.0,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Debian DLA	DLA-4606-1	linux security update

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0016.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d
https://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc
https://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1
https://git.kernel.org/stable/c/9e7021d2aeae57c323a6f722ed7915686cdcc123
https://git.kernel.org/stable/c/a488001a8197da4f9c413eec8f6acbff71c60145
https://git.kernel.org/stable/c/ac7739b78ded519e1d9919a814da3b34120bec8c
https://git.kernel.org/stable/c/eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f
https://lore.kernel.org/linux-cve-announce/2026052725-CVE-2026-45923-feed@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-45923
https://www.cve.org/CVERecord?id=CVE-2026-45923

History

Thu, 28 May 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-1287
References		https://lore.kernel.org/linux-cve-announce/2026052725-CVE-2026-45923-feed@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-45923 https://www.cve.org/CVERecord?id=CVE-2026-45923
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Low`

Wed, 27 May 2026 16:45:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-20

Wed, 27 May 2026 14:15:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: net: usb: catc: enable basic endpoint checking catc_probe() fills three URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX - usb_rcvintpipe(usbdev, 2) for interrupt status A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a catc_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls after usb_set_interface() to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time. Similar to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") which fixed the issue in rtl8150.
Title		net: usb: catc: enable basic endpoint checking
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d https://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc https://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1 https://git.kernel.org/stable/c/9e7021d2aeae57c323a6f722ed7915686cdcc123 https://git.kernel.org/stable/c/a488001a8197da4f9c413eec8f6acbff71c60145 https://git.kernel.org/stable/c/ac7739b78ded519e1d9919a814da3b34120bec8c https://git.kernel.org/stable/c/eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-05-27T12:17:42.312Z

Updated: 2026-05-27T12:17:42.312Z

Reserved: 2026-05-13T15:03:33.085Z

Link: CVE-2026-45923

Vulnrichment

No data.

NVD

Status : Awaiting Analysis

Published: 2026-05-27T14:17:07.283

Modified: 2026-06-17T10:52:44.240

Link: CVE-2026-45923

Redhat

Severity : Low

Publid Date: 2026-05-27T00:00:00Z

Links: CVE-2026-45923 - Bugzilla

OpenCVE Enrichment

Updated: 2026-05-28T14:15:19Z

Weaknesses

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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