Unspecified impact via framebuffer size overflow
Published Sep 16, 2026 · Updated Sep 16, 2026
Integer overflow in the Linux kernel ofdrm driver allows attackers to cause unspecified impact via oversized framebuffer dimensions. The fb_size calculation multiplies signed-int linebytes and height values without checking for overflow, so large operands invoke undefined behavior before the size is used. Reachability requires both values to exceed safe multiplication bounds; the public record does not state whether exploitation causes corruption, a crash, or another impact.
Summary
What happened
Integer overflow in the Linux kernel ofdrm driver allows attackers to cause unspecified impact via oversized framebuffer dimensions. The fb_size calculation multiplies signed-int linebytes and height values without checking for overflow, so large operands invoke undefined behavior before the size is used. Reachability requires both values to exceed safe multiplication bounds; the public record does not state whether exploitation causes corruption, a crash, or another impact.
The record
- CVE
- CVE-2026-89806
- Published
- Sep 16, 2026
- Updated
- Sep 16, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-190
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 16, 2026CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.2
- Affected versionversion=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <c6f48e59ece0123f6a11527ad4d89b21c2d65b87
- Affected versionversion=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <d9daf9a6e7a6f82ef338a09386eefc6807100d3f
- Affected versionversion=c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 <ded6ad826fe0fd059333d3a3b3e1742c8e45ff41
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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