comedi: ni_atmio16d: Fix invalid clean-up after failed attac…(CVE-2026-31749)

概要

comedi: ni_atmio16d: Fix invalid clean-up after failed attach

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

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.

出典: OSV.dev (Open Source Vulnerabilities) NVD OSV

影響パッケージ

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.30"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.134"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.81"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}]

ディストリビューション別の修正状況

各ディストリビューションが公開している、この CVE の修正パッケージ

BellSoft Alpaquita BELL-CVE-2026-31749 linux-lts 修正版: 6.1.168-r0
Debian DEBIAN-CVE-2026-31749 linux 修正版: 5.10.257-1
Ubuntu UBUNTU-CVE-2026-31749 linux

概要

原文の説明

影響パッケージ

ディストリビューション別の修正状況

参照URL