linux-cve-announce - CVE-2025-68754: rtc: amlogic-a4: fix double free caused by devm

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Message-ID: <2026010549-CVE-2025-68754-7189@gregkh>
Date: Mon,  5 Jan 2026 10:32:50 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68754: rtc: amlogic-a4: fix double free caused by devm

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

rtc: amlogic-a4: fix double free caused by devm

The clock obtained via devm_clk_get_enabled() is automatically managed
by devres and will be disabled and freed on driver detach. Manually
calling clk_disable_unprepare() in error path and remove function
causes double free.

Remove the redundant clk_disable_unprepare() calls from the probe
error path and aml_rtc_remove(), allowing the devm framework to
automatically manage the clock lifecycle.

The Linux kernel CVE team has assigned CVE-2025-68754 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.13 with commit c89ac9182ee297597f1c6971045382bae19c3f9d and fixed in 6.17.13 with commit 9fed02c16488050cd4e33e045506336b216d7301
	Issue introduced in 6.13 with commit c89ac9182ee297597f1c6971045382bae19c3f9d and fixed in 6.18.2 with commit 2e1c79299036614ac32b251d145fad5391f4bcab
	Issue introduced in 6.13 with commit c89ac9182ee297597f1c6971045382bae19c3f9d and fixed in 6.19-rc1 with commit 384150d7a5b60c1086790a8ee07b0629f906cca2

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-68754
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/rtc/rtc-amlogic-a4.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/9fed02c16488050cd4e33e045506336b216d7301
	https://git.kernel.org/stable/c/2e1c79299036614ac32b251d145fad5391f4bcab
	https://git.kernel.org/stable/c/384150d7a5b60c1086790a8ee07b0629f906cca2