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CVE-2026-98609

drm/virtio: fix object leak when drm_gem_handle_create() fails

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/virtio: fix object leak when drm_gem_handle_create() fails virtio_gpu_gem_create() owns the reference taken by virtio_gpu_object_create(). On the drm_gem_handle_create() error path it calls drm_gem_object_release() instead of dropping that reference. drm_gem_object_release() is the inverse of drm_gem_object_init() and does not touch the reference count or call obj->funcs->free(), so it is only correct as the last step of a destructor, as in virtio_gpu_cleanup_object(). Using it here leaves the bo at refcount 1 with no remaining reference, so virtio_gpu_free_object() never runs and the shmem pages, sg table and virtio_gpu_object are leaked. Since virtio_gpu_object_create() has already set bo->created, VIRTIO_GPU_CMD_RESOURCE_UNREF is not queued either, leaking the host-side resource and the resource id. drm_gem_handle_create_tail() drops the handle reference on all of its internal error paths, so the caller only has to drop its own. Use drm_gem_object_put(), matching the success path below.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in 13423a058187c2039aa8cb235c916be4477221b7; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in 687be2f8b5e0e0ca9a7028f8f6413d0ed3fbb9dc; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in 264ae8ac8fd625b6c118baf16c111adeee2ec632; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in e2edd2d78d2cf8446de017adec9598feefed3297; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in 372e9c3d45f664a2c000427ccbf6cdc2f99b3170; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in a93dce15dfef200c346b050a2acbed516cc62706; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in f75066c79d1eec453c0d386ef8636873d1e11f2c; From dc5698e80cf724770283e10414054662bdf6ccfa · fixed in 36570ef2244cc4d7563b1f0157bc0f032498638c

  • Linux Linux

    4.2

  • KernelLinux

    From 4.2.0 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9

References 8

git.kernel.org