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DEBIAN-CVE-2026-89940
No affected components available
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.
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The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- EUVD-2026-80540Upstream
- CVE-2026-89940Upstream
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