CVE-2026-74459

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_read_bulk_callback(): fix RX buffer leak on URB resubmit failure es58x_read_bulk_callback() resubmits the RX URB after processing a received packet. If the resubmit succeeds, the URB remains anchored and will be handled by the normal RX path or by teardown. However, if usb_submit_urb() fails, the callback unanchors the URB and then returns directly. This skips the existing free_urb path, so the coherent transfer buffer allocated with usb_alloc_coherent() is not released. Reuse the existing free_urb path after a resubmit failure so that the RX coherent buffer is freed before leaving the callback.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/0ef136ba052101243ba117a1aca6f4a4c3a81142
https://git.kernel.org/stable/c/19c6c8c6cd5dd14fab5fcd744584812a57cbb78d
https://git.kernel.org/stable/c/21da1a374769751546cc131e58a4d8bd968f57b2
https://git.kernel.org/stable/c/7a0cf2b2497c757c3cb1286eddf2986abb0d387b
https://git.kernel.org/stable/c/b85e5c310382803d27adf6fe6554d4208bc8951c
https://git.kernel.org/stable/c/c311f17c261fd375ddf5755f2ebe1f022c19c5b0
https://git.kernel.org/stable/c/c7ddf119544eea2d8409e12471c3f9f36ca02e3f

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 13:17

Updated : 2026-08-19 17:21

NVD link : CVE-2026-74459

Mitre link : CVE-2026-74459

CVE.ORG link : CVE-2026-74459

JSON object : View

Products Affected

No product.

CWE

No CWE.

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If the resubmit succeeds, the URB remains anchored and will be\nhandled by the normal RX path or by teardown.\n\nHowever, if usb_submit_urb() fails, the callback unanchors the URB and then\nreturns directly. This skips the existing free_urb path, so the coherent\ntransfer buffer allocated with usb_alloc_coherent() is not released.\n\nReuse the existing free_urb path after a resubmit failure so that the RX\ncoherent buffer is freed before leaving the callback."}], "lastModified": "2026-08-19T17:21:02.803", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}