CVE-2026-89941 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506654
- published5 Oct 2026
- disclosed16 Sept 2026
Introduced: 16 Sep 2026
NewCVE-2026-89941 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-89941
- https://git.kernel.org/stable/c/06a9460b8b792e109cbc934a856d02e5cff217ef
- https://git.kernel.org/stable/c/11cef99491117d4264603df159c4ff5f3845a059
- https://git.kernel.org/stable/c/311595dc0b5621f74d8eb4dc38ef4efcdfe7e769
- https://git.kernel.org/stable/c/8662e56c31cf23b61ca3d11b516efb94c35b8026