CVE-2026-72266: fbdev: vesafb: fix memory leak in vesafb_probe()

CVE-2026-72266: fbdev: vesafb: fix memory leak in vesafb_probe()

[Greg Kroah-Hartman]

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

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

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

fbdev: vesafb: fix memory leak in vesafb_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
vesafb_probe(). Fix that by freeing the option string after setup.

The Linux kernel CVE team has assigned CVE-2026-72266 to this issue.


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

	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.6.145 with commit 124df55c7201d011a3fead2205685b6c47eae093
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.12.97 with commit 43af398217ca8940bf30643fd1150b4c655b8a88
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 6.18.40 with commit 58bc18e03481b62f0ec53fe47f36615d52660a7d
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 7.1.5 with commit 7b96ce9f8e47538c3c6eebbb217c94d696975cac
	Issue introduced in 6.4 with commit 73ce73c30ba9ae4d90fdfad7ebe9104001d5d851 and fixed in 7.2-rc1 with commit b15d708995c01bbffe7dcd634a31959f6805bed3

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-2026-72266
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/vesafb.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/124df55c7201d011a3fead2205685b6c47eae093
	https://git.kernel.org/stable/c/43af398217ca8940bf30643fd1150b4c655b8a88
	https://git.kernel.org/stable/c/58bc18e03481b62f0ec53fe47f36615d52660a7d
	https://git.kernel.org/stable/c/7b96ce9f8e47538c3c6eebbb217c94d696975cac
	https://git.kernel.org/stable/c/b15d708995c01bbffe7dcd634a31959f6805bed3