CVE-2026-89894 Linux kernel cx231xx - Out-of-Bounds Write

Linux kernel media cx231xx contains a heap out-of-bounds write caused by allowing geometry changes while the VBI queue is busy, letting attackers cause memory corruption, exploit requires running VBI stream.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Write
Impact
Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for cx231xx VBI queue geometry handling.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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