SB20260918426 - Integer overflow in Linux kernel fbdev kyro driver
Published: September 18, 2026
Security Bulletin ID
SB20260918426
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-90245)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause incorrect overlay viewport register configuration.
The vulnerability exists due to integer overflow in the kyro framebuffer driver's overlay viewport coordinate calculations when processing oversized overlay viewport coordinates. A local user can supply oversized viewport coordinate values to cause incorrect overlay viewport register configuration.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2ac6e30a552e6f9932c21c865a5c69f40c8aef64
- https://git.kernel.org/stable/c/33e54e3e0b2ca959304e62c3d84f0ad49bbe1afe
- https://git.kernel.org/stable/c/413d763439ba68e5d547538e6b6c7de97d5818a5
- https://git.kernel.org/stable/c/7b5c7bc55e13e7f5ac7b1eaf5c6d690389ea5ee3
- https://git.kernel.org/stable/c/7bf36dc23bcf3496dec274a46ae0aaff4961ea03
- https://git.kernel.org/stable/c/a6decd4e72fc5846d3b268bd085a2089213fd5ee
- https://git.kernel.org/stable/c/d8c1a9579cbd8f4ac5cbd5a10f1afb5ee64adf30
- https://git.kernel.org/stable/c/e8d4e4cf388daeb49704f3de10b203034f28eb90