CVE-2026-72274: fbdev: hecubafb: fix potential memory leak in hecubafb_probe()

CVE-2026-72274: fbdev: hecubafb: fix potential memory leak in hecubafb_probe()

[Greg Kroah-Hartman]

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

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

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

fbdev: hecubafb: fix potential memory leak in hecubafb_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-2026-72274 to this issue.


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

	Issue introduced in 5.15.149 with commit 186b89659c4c67cccead52961eab0ca3b23951dc and fixed in 5.15.212 with commit 3eb2bc1009c2476426ffbaf642d7ac82f4685b4d
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.1.178 with commit 7de72f7534d961b117e0b051fa8798975036f5f3
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.6.145 with commit 2952767e399e2796d45644ea50f442988d2bb02d
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.12.97 with commit 612ea3a8e525580aa82f26ab873e285f5caf9d99
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 6.18.40 with commit d684ce2db92b1093bcca2b42e5160a5fe23eb496
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 7.1.5 with commit 9a94b85531852eb86283eca36ab041782c6b3518
	Issue introduced in 5.19 with commit 56c134f7f1b58be08bdb0ca8372474a4a5165f31 and fixed in 7.2-rc1 with commit cbef2a305a8a72969b86f96b7c07b86edde61aff

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-2026-72274
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/hecubafb.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/3eb2bc1009c2476426ffbaf642d7ac82f4685b4d
	https://git.kernel.org/stable/c/7de72f7534d961b117e0b051fa8798975036f5f3
	https://git.kernel.org/stable/c/2952767e399e2796d45644ea50f442988d2bb02d
	https://git.kernel.org/stable/c/612ea3a8e525580aa82f26ab873e285f5caf9d99
	https://git.kernel.org/stable/c/d684ce2db92b1093bcca2b42e5160a5fe23eb496
	https://git.kernel.org/stable/c/9a94b85531852eb86283eca36ab041782c6b3518
	https://git.kernel.org/stable/c/cbef2a305a8a72969b86f96b7c07b86edde61aff