hwmon: (powerz) Fix use-after-free on USB disconnect(CVE-2026-31582)

概要

hwmon: (powerz) Fix use-after-free on USB disconnect

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:

hwmon: (powerz) Fix use-after-free on USB disconnect

After powerz_disconnect() frees the URB and releases the mutex, a
subsequent powerz_read() call can acquire the mutex and call
powerz_read_data(), which dereferences the freed URB pointer.

Fix by:

Setting priv->urb to NULL in powerz_disconnect() so that
powerz_read_data() can detect the disconnected state.
Adding a !priv->urb check at the start of powerz_read_data()
to return -ENODEV on a disconnected device.
Moving usb_set_intfdata() before hwmon registration so the
disconnect handler can always find the priv pointer.

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

影響パッケージ

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.83"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.20.0"},{"fixed":"7.0.1"}]}]

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-2026-31582 linux-lts 修正版: 6.12.85-r0
Debian DEBIAN-CVE-2026-31582 linux 修正版: 6.12.85-1
Ubuntu UBUNTU-CVE-2026-31582 linux-hwe-edge

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