What’s Vulnerable › Vulnerabilities

CVE-2026-90297: drm/sun4i: crtc: Propagate layer initialization error

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: crtc: Propagate layer initialization error sun4i_crtc_init() returns plain NULL when layer initialization fails, while all its other error paths return an error pointer. The only caller, sun4i_tcon_bind(), checks the result with IS_ERR() and happily continues with tcon->crtc set to NULL. sun4i_rgb_init() and sun4i_lvds_init() then dereference it in drm_crtc_mask(), which oopses. Return the error pointer instead.

Affected products

• Linux kernel: 4.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1882112124a642de7571fbf354fa1929decbb3ef
• https://git.kernel.org/stable/c/2bb3169788f8296c8fc1e0d4fa6f1c6367cd5829
• https://git.kernel.org/stable/c/65bc02fec98e4e1d7d59d86cf2ddf8fd73dacb89
• https://git.kernel.org/stable/c/7061ff05ed4a3cf16e83f7e3ad09cbd212508a32
• https://git.kernel.org/stable/c/8f32af44d43332c02198752e596df00659bf4354
• https://git.kernel.org/stable/c/aaf812960fb5ade24be7a1d8fea27a1ffc458c30
• https://git.kernel.org/stable/c/c0d3219ffd4c0d42295e0dc949856067b7818b71
• https://git.kernel.org/stable/c/e216d6168f25a69e5ae5b981ee73b3a860a46441

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