{"id":"CVE-2026-89941","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89941","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: Make IIO DMA fence release RCU-safe\n\nThe `dma_fence` documentation states that if a custom release\nimplementation…","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: Make IIO DMA fence release RCU-safe\n\nThe `dma_fence` documentation states that if a custom release\nimplementation is provided, the `dma_fence` object must be freed in an\nRCU-safe way. The current `iio_dma_fence` implementation uses `kfree()`,\nwhich might result in a use-after-free.\n\nRemove the custom `release` implementation. This makes the DMA fence core\nfall back to `dma_fence_free()`, which calls `kfree_rcu()` on the fence.\nThis requires that the fence be the first member of `struct iio_dma_fence`.\n\nUsing the default release method for extended DMA fence structures is a\ncommon pattern.","published":"2026-09-16T11:17:03.733","modified":"2026-09-16T11:17:03.733","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/06a9460b8b792e109cbc934a856d02e5cff217ef"},{"type":"WEB","url":"https://git.kernel.org/stable/c/11cef99491117d4264603df159c4ff5f3845a059"},{"type":"WEB","url":"https://git.kernel.org/stable/c/311595dc0b5621f74d8eb4dc38ef4efcdfe7e769"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8662e56c31cf23b61ca3d11b516efb94c35b8026"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T11:17:03.733"}}