Use-after-free in Linux kernel - CVE-2026-93818
Published: September 25, 2026
Vulnerability identifier: #VU152071
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-2026-93818
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in the PLDA PCIe host controller root bus removal routine when concurrent rescan or hotplug operations are triggered through sysfs. A local user can initiate concurrent sysfs operations to trigger a use-after-free condition and crash the system.
Affected software
Linux kernel
How to mitigate CVE-2026-93818
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3