CVE-2026-43426 Details
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.
A use-after-free vulnerability has been identified in the Renesas USBHS driver of the Linux kernel. This issue arises in the 'usbhs_remove()' function, where the driver deallocates resources, including the pipe array, while the interrupt service routine (ISR) 'usbhs_interrupt' remains registered. If an interrupt occurs after 'usbhs_pipe_remove()' has been called but before the driver has completely unbound, the ISR could access freed memory, leading to a use-after-free condition. The vulnerability affects the Linux kernel stable tree.
The vulnerability has been addressed by modifying the 'usbhs_remove()' function to call 'devm_free_irq()' before freeing other resources. This change ensures that the interrupt handler is disabled and any ongoing ISR execution is completed before the pipe removal process begins.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0b7d11fd6e742ecc0b1eca44b4f0b93140c74bae | kernel.org | Patch |
| https://git.kernel.org/stable/c/1899edac312ef17a7234851686e8a703f56d0a84 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3cbc242b88c607f55da3d0d0d336b49bf1e20412 | kernel.org | Patch |
| https://git.kernel.org/stable/c/51afaf919bbaacdd9cc9e146033ae0a743a42dd7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6287e0c01ccb818e7214f88d885ffb7c9e81b0e0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6ffe44f022c95b1b29c691d2169c5abc046f7580 | kernel.org | Patch |
| https://git.kernel.org/stable/c/9c6159d5b72d5fc265cce5da04f27d730b552e69 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c7012fc73dab4829404fedeeaa8531f12ac8545f | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 3.0, < 5.10.253 >= 5.11, < 5.15.203 >= 5.16, < 6.1.167 >= 6.2, < 6.6.130 >= 6.7, < 6.12.78 >= 6.13, < 6.18.19 >= 6.19, < 6.19.9 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 20, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | New CVE Received | kernel.org |