linux-cve-announce - CVE-2025-39934: drm: bridge: anx7625: Fix NULL pointer dereference with early IRQ

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Message-ID: <2025100417-CVE-2025-39934-4c48@gregkh>
Date: Sat,  4 Oct 2025 09:33:18 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39934: drm: bridge: anx7625: Fix NULL pointer dereference with early IRQ

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

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

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

drm: bridge: anx7625: Fix NULL pointer dereference with early IRQ

If the interrupt occurs before resource initialization is complete, the
interrupt handler/worker may access uninitialized data such as the I2C
tcpc_client device, potentially leading to NULL pointer dereference.

The Linux kernel CVE team has assigned CVE-2025-39934 to this issue.


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

	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 6.1.154 with commit f9a089d0a6d537d0f2061c8a37a7de535ce0310e
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 6.6.108 with commit 15a77e1ab0a994d69b471c76b8d01117128dda26
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 6.12.49 with commit 0da73f7827691a5e2265b110d5fe12f29535ec92
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 6.16.9 with commit 1a7ea294d57fb61485d11b3f2241d631d73025cb
	Issue introduced in 5.11 with commit 8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 and fixed in 6.17 with commit a10f910c77f280327b481e77eab909934ec508f0

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-2025-39934
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/gpu/drm/bridge/analogix/anx7625.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/f9a089d0a6d537d0f2061c8a37a7de535ce0310e
	https://git.kernel.org/stable/c/15a77e1ab0a994d69b471c76b8d01117128dda26
	https://git.kernel.org/stable/c/0da73f7827691a5e2265b110d5fe12f29535ec92
	https://git.kernel.org/stable/c/1a7ea294d57fb61485d11b3f2241d631d73025cb
	https://git.kernel.org/stable/c/a10f910c77f280327b481e77eab909934ec508f0