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

net: usb: pegasus: enable basic endpoint checking

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

- usb_rcvbulkpipe(dev, 1) for RX data
- usb_sndbulkpipe(dev, 2) for TX data
- usb_rcvintpipe(dev, 3) for status interrupts

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

Add a pegasus_usb_ep enum for endpoint numbers, replacing magic
constants throughout. Add usb_check_bulk_endpoints() and
usb_check_int_endpoints() calls before any resource allocation to
verify endpoint types before use, rejecting devices with mismatched
descriptors at probe time, and avoid triggering assertion.

Similar fix to
- commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking")
- commit 9e7021d2aeae ("net: usb: catc: enable basic endpoint checking")

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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 Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < a3e64e950a3981a8199de9798f6d21261b959171
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 229dc9b9db475ac900182bafe258943e0e054c6d
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 26b3ec62fa1a94ac801feca47f040fc729b3c174
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 35854ed5c40b02f95824e44398f9d2ba33727203
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 67ba6b13dbcaf45681fb6758794c5ac5fa589a6c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < d2e7c898cc02dfe42443489a67a45ed616cb76e9
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 2705709f6574a088aab246af72fc95f2fea51484
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 3d7e6ce34f4fcc7083510c28b17a7c36462a25d4
Linux Linux affected
Version Status Constraints
2.6.12 affected —
0 unaffected < 2.6.12
5.10.252 unaffected ≤ 5.10.*
5.15.202 unaffected ≤ 5.15.*
6.1.165 unaffected ≤ 6.1.*
6.6.128 unaffected ≤ 6.6.*
6.12.75 unaffected ≤ 6.12.*
6.18.16 unaffected ≤ 6.18.*
6.19.6 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d cve-icon cve-icon
https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174 cve-icon cve-icon
https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484 cve-icon cve-icon
https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203 cve-icon cve-icon
https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4 cve-icon cve-icon
https://git.kernel.org/stable/c/67ba6b13dbcaf45681fb6758794c5ac5fa589a6c cve-icon cve-icon
https://git.kernel.org/stable/c/a3e64e950a3981a8199de9798f6d21261b959171 cve-icon cve-icon
https://git.kernel.org/stable/c/d2e7c898cc02dfe42443489a67a45ed616cb76e9 cve-icon cve-icon
History

Wed, 06 May 2026 14:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Wed, 06 May 2026 12:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: enable basic endpoint checking pegasus_probe() fills URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_rcvbulkpipe(dev, 1) for RX data - usb_sndbulkpipe(dev, 2) for TX data - usb_rcvintpipe(dev, 3) for status interrupts A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a pegasus_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls before any resource allocation to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time, and avoid triggering assertion. Similar fix to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") - commit 9e7021d2aeae ("net: usb: catc: enable basic endpoint checking")
Title net: usb: pegasus: 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

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-06T11:27:36.491Z

Reserved: 2026-05-01T14:12:55.989Z

Link: CVE-2026-43156

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-06T12:16:33.427

Modified: 2026-05-06T13:07:51.607

Link: CVE-2026-43156

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-06T13:45:04Z

Weaknesses