CVE-2026-89806
HIGH
8,4
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Attack Vector: local
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation
The framebuffer size calculation `fb_size = linebytes * height` can
overflow when both values are large (e.g., 46341 * 46341 > INT_MAX).
Since linebytes and height are both int types, the multiplication is
performed as int * int, which results in undefined behavior on overflow.
Use check_mul_overflow() to detect and prevent this overflow, consistent
with the approach used in simpledrm.c and corebootdrm.c.
https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87
https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f
https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41