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Vulnerability record · CVE-2026-43426 · published 8 May 2026

CVE-2026-43426: Linux kernel use after free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: usb: renesas_usbhs: fix use-after-free in ISR during device removal In usbhs_remove(), the driver frees resources (including the pipe array) while the interrupt handler (usbhs_interrupt) is still registered. If an interrupt fires after usbhs_pipe_remove() but before the driver is fully unbound, the ISR may access freed memory, causing a use-after-free. Fix this by calling devm_free_irq() before freeing resources. This ensures the interrupt handler is both disabled and synchronized (waits for any running ISR to complete) before usbhs_pipe_remove() is called.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.2% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.17%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: renesas_usbhs: fix use-after-free in ISR during device removal In usbhs_remove(), the driver frees resources (including the pipe array) while the interrupt handler (usbhs_interrupt) is still registered. If an interrupt fires after usbhs_pipe_remove() but before the driver is fully unbound, the ISR may access freed memory, causing a use-after-free. Fix this by calling devm_free_irq() before freeing resources. This ensures the interrupt handler is both disabled and synchronized (waits for any running ISR to complete) before usbhs_pipe_remove() is called.

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/0b7d11fd6e742ecc0b1eca44b4f0b93140c74bae Patch
https://git.kernel.org/stable/c/1899edac312ef17a7234851686e8a703f56d0a84 Patch
https://git.kernel.org/stable/c/3cbc242b88c607f55da3d0d0d336b49bf1e20412 Patch
https://git.kernel.org/stable/c/51afaf919bbaacdd9cc9e146033ae0a743a42dd7 Patch
https://git.kernel.org/stable/c/6287e0c01ccb818e7214f88d885ffb7c9e81b0e0 Patch
https://git.kernel.org/stable/c/6ffe44f022c95b1b29c691d2169c5abc046f7580 Patch
https://git.kernel.org/stable/c/9c6159d5b72d5fc265cce5da04f27d730b552e69 Patch
https://git.kernel.org/stable/c/c7012fc73dab4829404fedeeaa8531f12ac8545f Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43426), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.