CVE-2026-89818

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89818

Key Details

CVE	CVE-2026-89818
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check

If the supplied msg[2] (num_buffers) is 0x3FFFFFFF, the expression

6 + num_buffers * 4 wraps to 2 and the bounds check passes, letting

the parser loop far past the end of the message BO. Triggering it

additionally requires a ~4GiB mapping so that msg[1] survives the

earlier "header does not fit in BO" check.

Rewrite the test in division form, which is overflow-free by

construction. Also update the message to reflect that msg is invalid. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89818
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89818

Source

Reference

NVD

CVE