--- cve: "CVE-2026-31749" severity: "LOW" cvss: 3.1 epss: "12%" vendor: "Linux" kev: false exploited: false published: "2026-05-01 15:16:37" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-10T09:30:38+02:00" --- # CVE-2026-31749 > 3.1 LOW ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: comedi: ni_atmio16d: Fix invalid clean-up after failed attach If the driver's COMEDI "attach" handler function (`atmio16d_attach()`) returns an error, the COMEDI core will call the driver's "detach" handler function (`atmio16d_detach()`) to clean up. This calls `reset_atmio16d()` unconditionally, but depending on where the error occurred in the attach handler, the device may not have been sufficiently initialized to call `reset_atmio16d()`. It uses `dev->iobase` as the I/O port base address and `dev->private` as the pointer to the COMEDI device's private data structure. `dev->iobase` may still be set to its initial value of 0, which would result in undesired writes to low I/O port addresses. `dev->private` may still be `NULL`, which would result in null pointer dereferences. Fix `atmio16d_detach()` by checking that `dev->private` is valid (non-null) before calling `reset_atmio16d()`. This implies that `dev->iobase` was set correctly since that is set up before `dev->private`. ## Patch verfügbar (OSV) - Kernel ≥ 5.10.253 - Kernel ≥ 5.15.203 - Kernel ≥ 6.1.168 - Kernel ≥ 6.6.134 - Kernel ≥ 6.12.81 - Kernel ≥ 6.18.22 - Kernel ≥ 6.19.12 ## Referenzen - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-31749) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_