Description
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.
References5
- git.kernel.org/stable/c/0cec951667a624fafaca2695c46042f45851caec
- git.kernel.org/stable/c/711fe7949d37656a5586244afee9523b9e5e37e9
- git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87
- git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f
- git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41
Metrics
- CVSS 3.1
-
8.4
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 8 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.