# CVE-2026-80888

## Summary

- **CVE ID:** CVE-2026-80888
- **Severity:** UNKNOWN
- **CVSS Score:** 1.51
- **CWE:** N/A
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 16, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: drop dma_buf reference on foreign-fd prime import

ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's
dma_buf->ops do not match the ttm_object_device's ops, but does so
without releasing the reference acquired by dma_buf_get().  Any
unprivileged renderD client passing a non-vmwgfx prime fd through the
DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per
call and indefinitely pins the foreign exporter's GEM resources.

Funnel the error path through the existing dma_buf_put() so the
reference is always dropped.

## Affected Products

- Linux — Linux (65981f7681abdf92b25942222b629b9c512d0705)
- Linux — Linux (3.13)
- Linux — Linux (0)
- Linux — Linux (6.1.183)
- Linux — Linux (6.6.151)
- Linux — Linux (6.12.103)
- Linux — Linux (6.18.44)
- Linux — Linux (7.1.8)
- Linux — Linux (7.2)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)

## References

- [CNA](https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057)
- [CNA](https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be)
- [CNA](https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293)
- [CNA](https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f)
- [CNA](https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf)
- [CNA](https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d)
- [CNA](https://git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278)
- [CNA](https://git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._