CVE-2026-53190 drm/virtio: fix dma_fence refcount leak on error in virtio_gpu_dma_fence_wait()

What is CVE-2026-53190?

CVE-2026-53190 is a medium-severity vulnerability in Linux kernel, published on 25 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

drm/virtio: fix dma_fence refcount leak on error in virtio_gpu_dma_fence_wait()

dma_fence_unwrap_for_each() internally calls dma_fence_unwrap_first() which does cursor->chain = dma_fence_get(head), taking an extra reference. On normal loop completion, dma_fence_unwrap_next() releases this via dma_fence_chain_walk() -> dma_fence_put().

When virtio_gpu_do_fence_wait() fails and the function returns early from inside the loop, the cursor->chain reference is never released. This is the only caller in the entire kernel that does an early return inside dma_fence_unwrap_for_each.

Add dma_fence_put(itr.chain) before the early return.

Which versions are affected by CVE-2026-53190?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-53190?

Apply the vendor's patch.

Is CVE-2026-53190 being exploited?

There is no known exploitation of CVE-2026-53190 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-90722, BELL-CVE-2026-53190, DEBIAN-CVE-2026-53190, GHSA-vc55-8273-pjx9, ROOT-OS-UBUNTU-2404-CVE-2026-53190, UBUNTU-CVE-2026-53190.