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Message-ID: <2025100702-CVE-2022-50514-cca3@gregkh>
Date: Tue,  7 Oct 2025 17:19:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50514: usb: gadget: f_hid: fix refcount leak on error path

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

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

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

usb: gadget: f_hid: fix refcount leak on error path

When failing to allocate report_desc, opts->refcnt has already been
incremented so it needs to be decremented to avoid leaving the options
structure permanently locked.

The Linux kernel CVE team has assigned CVE-2022-50514 to this issue.


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

	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 4.19.270 with commit 95412c932b3c9e8cc4431dac4fac8fcd80d54982
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 5.4.229 with commit 80dc47e751a837106c09bec73964ff8f7ea280b4
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 5.10.163 with commit e88b89a096af0001bcff6bf7ad2feb1486487173
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 5.15.86 with commit 9d4a0aca8a75550d3456c8de339a341dc4536ec5
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 6.0.16 with commit ba78f7c10606719f702c04a15fb0471507b32d7b
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 6.1.2 with commit 216437dd64fce36791a3b6cc8f8013df36856958
	Issue introduced in 3.19 with commit 21a9476a7ba847e413bf1c144d7c614532aed6dd and fixed in 6.2 with commit 70a3288a7586526315105c699b687d78cd32559a

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-2022-50514
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/usb/gadget/function/f_hid.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/95412c932b3c9e8cc4431dac4fac8fcd80d54982
	https://git.kernel.org/stable/c/80dc47e751a837106c09bec73964ff8f7ea280b4
	https://git.kernel.org/stable/c/e88b89a096af0001bcff6bf7ad2feb1486487173
	https://git.kernel.org/stable/c/9d4a0aca8a75550d3456c8de339a341dc4536ec5
	https://git.kernel.org/stable/c/ba78f7c10606719f702c04a15fb0471507b32d7b
	https://git.kernel.org/stable/c/216437dd64fce36791a3b6cc8f8013df36856958
	https://git.kernel.org/stable/c/70a3288a7586526315105c699b687d78cd32559a

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