CVE-2026-72276: fbdev: metronomefb: fix potential memory leak in metronomefb_probe()

CVE-2026-72276: fbdev: metronomefb: fix potential memory leak in metronomefb_probe()

[Greg Kroah-Hartman]

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

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

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

fbdev: metronomefb: fix potential memory leak in metronomefb_probe()

The memory allocated for pagerefs in fb_deferred_io_init() is not freed
on the error path. Fix it by calling fb_deferred_io_cleanup().

The Linux kernel CVE team has assigned CVE-2026-72276 to this issue.


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

	Issue introduced in 5.15.149 with commit 186b89659c4c67cccead52961eab0ca3b23951dc and fixed in 5.15.212 with commit 77e26383083c59a67244fcf2e70eecd354451906
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.1.178 with commit f779bd494f9521f89bfd4ce23953f3527341e9fd
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.6.145 with commit 01708cf3dca2f88eca26269521cbcc8e2f054ee4
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.12.97 with commit d54bb39cd34f44b32d5c4a8416fff8b01a9e76be
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.18.40 with commit 6854cf33dddb212bd7c3d69189623876e7334075
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 7.1.5 with commit a889978ec44fe33edb3fb7140dcbbb8e6465c1cb
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 7.2-rc1 with commit 894632b862a39b3fe1cb5de06fbae86225ea64de

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-2026-72276
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/metronomefb.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/77e26383083c59a67244fcf2e70eecd354451906
	https://git.kernel.org/stable/c/f779bd494f9521f89bfd4ce23953f3527341e9fd
	https://git.kernel.org/stable/c/01708cf3dca2f88eca26269521cbcc8e2f054ee4
	https://git.kernel.org/stable/c/d54bb39cd34f44b32d5c4a8416fff8b01a9e76be
	https://git.kernel.org/stable/c/6854cf33dddb212bd7c3d69189623876e7334075
	https://git.kernel.org/stable/c/a889978ec44fe33edb3fb7140dcbbb8e6465c1cb
	https://git.kernel.org/stable/c/894632b862a39b3fe1cb5de06fbae86225ea64de