SB20260815265 - Use-after-free in Linux kernel master mipi-i3c-hci driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-72454)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to a race condition leading to use-after-free in the mipi i3c hci address-to-device lookup function i3c_hci_addr_to_dev() when handling in-band interrupt events in the irq handler. A local attacker can trigger concurrent device addition or removal while an in-band interrupt is being processed to cause a denial of service.

The issue arises because the irq handler cannot take the bus lock protecting the device list.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/650716f23eac488c6696babdc7805f6a6b7427ad
• https://git.kernel.org/stable/c/8f851cab401c28287d536b1347d76f6e219c0db6