CVE-2026-89940
CVE CVE-2026-89940EUVD EUVD-2026-80540Published 2026-09-16T10:32:28.000ZLast changed 2026-09-16T14:40:26.000ZCVSS 7.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.2.5; 6.11; patch: 6.18.51; 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f <6865d79fca17a80fbd60c12550ca9a5e0e20e0eb; patch: 6.12.110; 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f <8b3e221590181a8beb3735bbabf166df02c839b5; patch: 7.3-rc1; 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f <f25ec4627d935dedfb5fe83bd2c2678cdcc19611; 3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f <510497e31be4f241103507315a859e2085ccb081; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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