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CVE-2023-53314: fbdev/ep93xx-fb: Do not assign to struct fb_info.dev

• Severity: medium (CVSS 5.5 v3.1)
• 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: 2025-09-16 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev/ep93xx-fb: Do not assign to struct fb_info.dev Do not assing the Linux device to struct fb_info.dev. The call to register_framebuffer() initializes the field to the fbdev device. Drivers should not override its value. Fixes a bug where the driver incorrectly decreases the hardware device's reference counter and leaks the fbdev device. v2: * add Fixes tag (Dan)

Affected products

• Linux kernel: from 2.6.32 before 4.14.326; from 4.15 before 4.19.295; from 4.20 before 5.4.257; from 5.5 before 5.10.195; from 5.11 before 5.15.132; from 5.16 before 6.1.54 — fixed in 4.14.326, 4.19.295, 5.10.195, 5.15.132, 5.4.257, 6.1.54

How to fix

Upgrade to a fixed version: Linux kernel 4.14.326, 4.19.295, 5.10.195, 5.15.132. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0517fc5a71333b315164736bbd32608894fbb872
• https://git.kernel.org/stable/c/1c6ff2a7c593db851f23e31ace2baf557ea9d0ff
• https://git.kernel.org/stable/c/309c27162afea79b3c7f8747bb650faf6923b639
• https://git.kernel.org/stable/c/4aade6c9100a3537788b6a9c7ac481037d19efdf
• https://git.kernel.org/stable/c/8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972
• https://git.kernel.org/stable/c/f83c1b13f8154e0284448912756d0a351a1a602a
• https://git.kernel.org/stable/c/f90a0e5265b60cdd3c77990e8105f79aa2fac994
• https://git.kernel.org/stable/c/ffdf2b020db717853167391a3a8d912e13428fa6

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