AZL-99684
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99684.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-99684
- Upstream
- Published
- 2026-09-04T18:17:56Z
- Modified
- 2026-09-05T14:15:11.227519159Z
- Summary
- CVE-2026-80888 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
ttmprimefdtohandle() returns -ENOSYS when the imported fd's dmabuf->ops do not match the ttmobjectdevice's ops, but does so without releasing the reference acquired by dmabufget(). Any unprivileged renderD client passing a non-vmwgfx prime fd through the DRMVMWGBSURFACE_REF{,EXT} path leaks one dmabuf reference per call and indefinitely pins the foreign exporter's GEM resources.
Funnel the error path through the existing dmabufput() so the reference is always dropped.
- References