Infinite loop in Linux kernel - CVE-2026-90181
Published: September 19, 2026
Vulnerability identifier: #VU151300
CSH Severity: Low
CVSS v4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90181
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to an infinite loop in __ublk_shmem_remove_ranges() when tearing down a registered SHMEM_ZC buffer during atomic xarray allocation failures. A local privileged user can trigger device teardown while failslab causes the required allocation failures to cause a denial of service.
The issue requires fault-injection support and a previously registered SHMEM_ZC buffer.
Affected software
Linux kernel
How to mitigate CVE-2026-90181
Install security update from vendor's repository.