Use-after-free in Linux kernel - CVE-2026-72454
Published: August 15, 2026
Vulnerability identifier: #VU142984
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-72454
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-72454
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38