CVE-2026-89818 Linux Kernel drm/amdgpu/vcn - Integer Overflow

Linux kernel drm/amdgpu/vcn contains an integer overflow caused by improper dec_msg buffer count check, letting attackers bypass bounds check and cause out-of-bounds access, exploit requires ~4GiB mapping.

CVSS base score 7.1 /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
Integer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix for drm/amdgpu/vcn integer overflow.

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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