CVE-2026-89940

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: The vulnerability in the Linux kernel allows a use-after-free condition due to the improper management of lock lifetimes in the `iio_dma_fence` implementation, which can lead to potential security issues if exploited.
Exploitability: Exploitation requires low privileges and specific conditions, making it moderately difficult. The attacker must have access to the affected system and be able to trigger the use-after-free condition.
Blast radius: If exploited, the vulnerability could lead to high impact, including data corruption, system instability, or even remote code execution, depending on the context and system configuration.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the latest version of the Linux kernel that includes the fix, such as 'Upgrade to 6.1.10 or later'.

kerneluse-after-freelow-privilegesystem-stability

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Tie IIO dma fence lock lifetime to the fence The `iio_dma_fence` implementation currently uses a lock embedded in the `iio_dmabuf_priv`. But the `iio_dma_fence` can outlive the `iio_dmabuf_priv`, which can cause a use-after-free. Tie the lifetime of the lock to the lifetime of the fence by embedding them in the same struct. We can't just hold a reference to the `iio_dmabuf_priv` from the `iio_dma_fence` since `iio_buffer_dmabuf_release()` might sleep and the fence release callback is not allowed to sleep. Note that the `dma_fence` framework now has an internal lock that gets used when the passing `NULL` for `lock` in `dma_fence_init()`, but in order to allow this patch to be backportable use an external lock.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.