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Vulnerability record · CVE-2026-31759 · published 1 May 2026

CVE-2026-31759: Linux kernel double free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: usb: ulpi: fix double free in ulpi_register_interface() error path When device_register() fails, ulpi_register() calls put_device() on ulpi->dev. The device release callback ulpi_dev_release() drops the OF node reference and frees ulpi, but the current error path in ulpi_register_interface() then calls kfree(ulpi) again, causing a double free. Let put_device() handle the cleanup through ulpi_dev_release() and avoid freeing ulpi again in ulpi_register_interface().

7.8 CVSS 3.1 High EPSS 0.18% · top 93.6% CWE-415 · Double free
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: usb: ulpi: fix double free in ulpi_register_interface() error path When device_register() fails, ulpi_register() calls put_device() on ulpi->dev. The device release callback ulpi_dev_release() drops the OF node reference and frees ulpi, but the current error path in ulpi_register_interface() then calls kfree(ulpi) again, causing a double free. Let put_device() handle the cleanup through ulpi_dev_release() and avoid freeing ulpi again in ulpi_register_interface().

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/01af542392b5d41fd659d487015a71f627accce3 Patch
https://git.kernel.org/stable/c/272a9b26c336a295e4e209157fed809706c1b1f7 Patch
https://git.kernel.org/stable/c/2f70ba9dae13a190673cc3f9b4aad52179738f60 Patch
https://git.kernel.org/stable/c/38c28fe25611099230f0965c925499bfcf46a795 Patch
https://git.kernel.org/stable/c/8763f8317bb389aded32a32b08f6751cfff657d2 Patch
https://git.kernel.org/stable/c/a6e5461f076c2ef63159f18e5cdbd30b50f0bc15 Patch
https://git.kernel.org/stable/c/aaeae6533d77e6ed4def85baec01e2815ebbef61 Patch
https://git.kernel.org/stable/c/ee248e6e941e4f2e634df2bd43e5f1ef810ab6df Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31759), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.