CVE-2026-72273: fbdev: efifb: fix memory leak in efifb_probe()

CVE-2026-72273: fbdev: efifb: fix memory leak in efifb_probe()

[Greg Kroah-Hartman]

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

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

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

fbdev: efifb: fix memory leak in efifb_probe()

Since commit 73ce73c30ba9 ("fbdev: Transfer video= option strings to
caller; clarify ownership") the string returned from fb_get_options()
is expected to be freed by the caller, but the string is not freed in
efifb_probe(). Fix that by freeing the option string after setup.

The Linux kernel CVE team has assigned CVE-2026-72273 to this issue.


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

	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.6.148 with commit fafb2e08741b20027cee77918816de29a32d6fd6
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.12.97 with commit 475383daf5f855f5b2c3a9aa801f69b69a81799e
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.18.40 with commit febb5b4f67ace78d6b6862cc3c853b64710afb6c
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 7.1.5 with commit 5276e3f75ddb51f980a8903f4b39e73cf42415e5
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 7.2-rc1 with commit 9b6eaf101656958397a6012bf43f6e2e42c9e5cb

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-2026-72273
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/video/fbdev/efifb.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/fafb2e08741b20027cee77918816de29a32d6fd6
	https://git.kernel.org/stable/c/475383daf5f855f5b2c3a9aa801f69b69a81799e
	https://git.kernel.org/stable/c/febb5b4f67ace78d6b6862cc3c853b64710afb6c
	https://git.kernel.org/stable/c/5276e3f75ddb51f980a8903f4b39e73cf42415e5
	https://git.kernel.org/stable/c/9b6eaf101656958397a6012bf43f6e2e42c9e5cb