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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux | Sep 30, 2026 | Sep 16, 2026 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-hwe-7.0Upgrade linux-awsUpgrade linux-oem-7.0Upgrade linuxUpgrade linux-riscvUpgrade linux-oracleUpgrade linux-ibmUpgrade linux-riscv-7.0 | Nov 3, 2026 | Sep 16, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 30, 2026 | Sep 16, 2026 |
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