PT-2026-36394 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-08 · CVE-2026-31759

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A double free issue exists in the USB ULPI (Ultra Low Power Interface) component. When the device register() function fails, ulpi register() invokes put device() on ulpi->dev. The device release callback ulpi dev release() then drops the Open Firmware (OF) node reference and frees the ulpi structure. However, the error path in the ulpi register interface() function calls kfree(ulpi) again, leading to a double free. A double free occurs when the system attempts to free the same memory location twice, which can lead to system instability or crashes.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2026-31759

ECHO-1067-0C80-8BE6

Affected Products

Linux Kernel

References · 18

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31759 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31759 · Vendor Advisory
• https://git.kernel.org/stable/c/a6e5461f076c2ef63159f18e5cdbd30b50f0bc15 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31759 · Security Note
• https://git.kernel.org/stable/c/aaeae6533d77e6ed4def85baec01e2815ebbef61 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31759 · Vendor Advisory
• https://git.kernel.org/stable/c/2f70ba9dae13a190673cc3f9b4aad52179738f60 · Patch
• https://git.kernel.org/stable/c/01af542392b5d41fd659d487015a71f627accce3 · Patch
• https://git.kernel.org/stable/c/ee248e6e941e4f2e634df2bd43e5f1ef810ab6df · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31759 · Vendor Advisory
• https://git.kernel.org/stable/c/272a9b26c336a295e4e209157fed809706c1b1f7 · Patch
• https://git.kernel.org/stable/c/8763f8317bb389aded32a32b08f6751cfff657d2 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31759 · Security Note
• https://git.kernel.org/stable/c/38c28fe25611099230f0965c925499bfcf46a795 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31759 · Vendor Advisory