CVE-2026-90245

fbdev: kyro: Validate overlay viewport coordinates

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

fbdev: kyro: Validate overlay viewport coordinates

The overlay viewport end coordinates are computed from the viewport origin and dimensions using 32-bit unsigned arithmetic. Large input values can cause these calculations to wrap around before the resulting coordinates are passed to SetOverlayViewPort().

SetOverlayViewPort() packs the viewport coordinates into 16-bit register fields. The X coordinates are additionally adjusted by +2 and +1 before being written. Validate the coordinate calculations for 32-bit wraparound and ensure that the adjusted coordinates fit within their 16-bit register fields before calling SetOverlayViewPort().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d8c1a9579cbd8f4ac5cbd5a10f1afb5ee64adf30Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2ac6e30a552e6f9932c21c865a5c69f40c8aef64Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 413d763439ba68e5d547538e6b6c7de97d5818a5Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e8d4e4cf388daeb49704f3de10b203034f28eb90Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a6decd4e72fc5846d3b268bd085a2089213fd5eeAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 33e54e3e0b2ca959304e62c3d84f0ad49bbe1afeAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7bf36dc23bcf3496dec274a46ae0aaff4961ea03Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7b5c7bc55e13e7f5ac7b1eaf5c6d690389ea5ee3Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before d8c1a9579cbd8f4ac5cbd5a10f1afb5ee64adf30Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2ac6e30a552e6f9932c21c865a5c69f40c8aef64Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 413d763439ba68e5d547538e6b6c7de97d5818a5Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e8d4e4cf388daeb49704f3de10b203034f28eb90Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before a6decd4e72fc5846d3b268bd085a2089213fd5eeAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 33e54e3e0b2ca959304e62c3d84f0ad49bbe1afeAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7bf36dc23bcf3496dec274a46ae0aaff4961ea03Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 7b5c7bc55e13e7f5ac7b1eaf5c6d690389ea5ee3Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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