CVE-2026-89806
- Source
- https://cve.org/CVERecord?id=CVE-2026-89806
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89806.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89806
- Downstream
- Published
- 2026-09-16T10:30:39Z
- Modified
- 2026-09-18T03:48:32Z
- Severity
-
- 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation
- Details
-
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 * heightcan 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89806.json" }- References
-
- https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87
- https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f
- https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89806.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89806
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git