CVE-2026-89941

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89941

Key Details

CVE	CVE-2026-89941
CVSS Score / Version	7.8 (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:H/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 high; 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:

iio: buffer: Make IIO DMA fence release RCU-safe

The `dma_fence` documentation states that if a custom release

implementation is provided, the `dma_fence` object must be freed in an

RCU-safe way. The current `iio_dma_fence` implementation uses `kfree()`,

which might result in a use-after-free.

Remove the custom `release` implementation. This makes the DMA fence core

fall back to `dma_fence_free()`, which calls `kfree_rcu()` on the fence.

This requires that the fence be the first member of `struct iio_dma_fence`.

Using the default release method for extended DMA fence structures is a

common pattern. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89941
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89941

Source

Reference

NVD

CVE