CVE-2026-45923
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.
Affected versions
Linux kernel versions
2.6.12
and later are affected. Fixed in
5.10.252,
6.1.165,
6.6.128,
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45923 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/163d04897e57633c5d2e69734e4e4b22bb63f50d
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PatchKernel patch commithttps://git.kernel.org/stable/c/1a42cfced8900d33d032c7ec338484855b61b8cc
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PatchKernel patch commithttps://git.kernel.org/stable/c/36c28b028efba0f42218d41fed12c47ce217c1f1
Frequently asked questions
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What is CVE-2026-45923?
CVE-2026-45923 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.12 onward and has been patched in 5.10.252, 6.1.165, 6.6.128 and others. CVE-2026-45923 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45923?
Yes — CVE-2026-45923 has been patched. Fixed versions include 5.10.252, 6.1.165, 6.6.128 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45923 actively exploited?
No — CVE-2026-45923 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.