Denial of service via truncated framebuffer size
Published Aug 10, 2026 · Updated Aug 10, 2026
Integer overflow in the Linux kernel's drm/sysfb component allows local users to cause a denial of service via large framebuffer dimensions. drm_sysfb_screen_info.c multiplies 32-bit height and stride values before widening the product, so large inputs truncate the visible-size calculation. Exploitation requires local low-privilege access and a system using drm/sysfb with an unusually large framebuffer; published impact is limited to service interruption.
Summary
What happened
Integer overflow in the Linux kernel's drm/sysfb component allows local users to cause a denial of service via large framebuffer dimensions. drm_sysfb_screen_info.c multiplies 32-bit height and stride values before widening the product, so large inputs truncate the visible-size calculation. Exploitation requires local low-privilege access and a system using drm/sysfb with an unusually large framebuffer; published impact is limited to service interruption.
The record
- CVE
- CVE-2026-68270
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-190, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=32ae90c66fb62e4f6ae859422f733dfb249f10cf <154795885e8f0033c918c815aece543168bee670
- Affected versionversion=32ae90c66fb62e4f6ae859422f733dfb249f10cf <9d58a811739a365cd693192f4b5344d736967a88
- Affected versionversion=32ae90c66fb62e4f6ae859422f733dfb249f10cf <b771974988ec7ce077a7246fa0fa588c246fe581
- Affected versionversion=6.16
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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