CVE-2026-23061

MEDIUM

Linux Kernel - Use-After-Free in kvaser_usb_read_bulk_callback

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb: kvaser_usb_read_bulk_callback(): fix URB memory leak Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak"). In kvaser_usb_set_{,data_}bittiming() -> kvaser_usb_setup_rx_urbs(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback kvaser_usb_read_bulk_callback(), the URBs are processed and resubmitted. In kvaser_usb_remove_interfaces() the URBs are freed by calling usb_kill_anchored_urbs(&dev->rx_submitted). However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in usb_kill_anchored_urbs(). Fix the memory leak by anchoring the URB in the kvaser_usb_read_bulk_callback() to the dev->rx_submitted anchor.

Scores

CVSS v3 5.5
EPSS 0.0012
EPSS Percentile 2.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-401
Status published
Products (24)
linux/Kernel 3.8.0 - 5.10.249linux
linux/Kernel 5.11.0 - 5.15.199linux
linux/Kernel 5.16.0 - 6.1.162linux
linux/Kernel 6.13.0 - 6.18.8linux
linux/Kernel 6.2.0 - 6.6.122linux
linux/Kernel 6.7.0 - 6.12.68linux
Linux/Linux < 3.8
Linux/Linux 080f40a6fa28dab299da7a652e444b1e2d9231e7 - 248e8e1a125fa875158df521b30f2cc7e27eeeaa
Linux/Linux 080f40a6fa28dab299da7a652e444b1e2d9231e7 - 3b1a593eab941c3f32417896cc7df564191f2482
Linux/Linux 080f40a6fa28dab299da7a652e444b1e2d9231e7 - 40a3334ffda479c63e416e61ff086485e24401f7
... and 14 more
Published Feb 04, 2026
Tracked Since Feb 18, 2026