CVE-2026-89806drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 before 711fe7949d37656a5586244afee9523b9e5e37e9; from c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 before ded6ad826fe0fd059333d3a3b3e1742c8e45ff41; from c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 before d9daf9a6e7a6f82ef338a09386eefc6807100d3f; from c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 before c6f48e59ece0123f6a11527ad4d89b21c2d65b87 | CNA record |
References
- https://git.kernel.org/stable/c/711fe7949d37656a5586244afee9523b9e5e37e9
- https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41
- https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f
- https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.