Exposure of Resource to Wrong Sphere in Linux kernel - CVE-2026-98156
Published: September 28, 2026
Vulnerability identifier: #VU152281
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98156
CWE-ID: CWE-668
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to compromise confidentiality, integrity, and availability of memory belonging to another domain.
The vulnerability exists due to improper DMA address handling in virtio_gpu_object_shmem_init() when providing resource backing for a virtio-gpu framebuffer. A local user can cause framebuffer backing pages to be described with guest-physical addresses to compromise confidentiality, integrity, and availability of memory belonging to another domain.
Only Xen PV domains are affected; PVH domains are identity-mapped.
Affected software
Linux kernel
How to mitigate CVE-2026-98156
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3