CVE-2026-89941
CVE-2026-89941 is a security vulnerability. O3 Security confirms whether CVE-2026-89941 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
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…
Description
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.
Detection & mitigation playbook
VulnerabilityDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Remediation status
No patched version of the affected component has shipped for CVE-2026-89941 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2026-89941 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2026-89941. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-89941 in your dependencies?
O3 detects CVE-2026-89941 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.