linux-cve-announce - CVE-2023-53263: drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector

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Message-ID: <2025091600-CVE-2023-53263-9abe@gregkh>
Date: Tue, 16 Sep 2025 10:07:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53263: drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector_create

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

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

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

drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector_create

We can't simply free the connector after calling drm_connector_init on it.
We need to clean up the drm side first.

It might not fix all regressions from commit 2b5d1c29f6c4
("drm/nouveau/disp: PIOR DP uses GPIO for HPD, not PMGR AUX interrupts"),
but at least it fixes a memory corruption in error handling related to
that commit.

The Linux kernel CVE team has assigned CVE-2023-53263 to this issue.


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

	Issue introduced in 6.0 with commit 95983aea80038539ebc70e41e73e9bb4eabd1a92 and fixed in 6.1.47 with commit 3f27451c9f29d5ed00232968680c7838a44dcac7
	Issue introduced in 6.0 with commit 95983aea80038539ebc70e41e73e9bb4eabd1a92 and fixed in 6.4.12 with commit 872feeecd08c81d212a52211d212897b8a857544
	Issue introduced in 6.0 with commit 95983aea80038539ebc70e41e73e9bb4eabd1a92 and fixed in 6.5 with commit 1b254b791d7b7dea6e8adc887fbbd51746d8bb27

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-2023-53263
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/nouveau/nouveau_connector.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/3f27451c9f29d5ed00232968680c7838a44dcac7
	https://git.kernel.org/stable/c/872feeecd08c81d212a52211d212897b8a857544
	https://git.kernel.org/stable/c/1b254b791d7b7dea6e8adc887fbbd51746d8bb27