linux-kernel - Re: CVE-2022-50495: x86/xen: Fix memory leak in xen_smp_intr_init{

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Message-ID: <2025100544-entertain-pueblo-a111@gregkh>
Date: Sun, 5 Oct 2025 11:31:55 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Juergen Gross <jgross@...e.com>
Cc: cve@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: CVE-2022-50495: x86/xen: Fix memory leak in
 xen_smp_intr_init{_pv}()

On Sat, Oct 04, 2025 at 07:30:35PM +0200, Juergen Gross wrote:
> On 04.10.25 17:51, Greg Kroah-Hartman wrote:
> > From: Greg Kroah-Hartman <gregkh@...nel.org>
> > 
> > Description
> > ===========
> > 
> > In the Linux kernel, the following vulnerability has been resolved:
> > 
> > x86/xen: Fix memory leak in xen_smp_intr_init{_pv}()
> > 
> > These local variables @{resched|pmu|callfunc...}_name saves the new
> > string allocated by kasprintf(), and when bind_{v}ipi_to_irqhandler()
> > fails, it goes to the @fail tag, and calls xen_smp_intr_free{_pv}() to
> > free resource, however the new string is not saved, which cause a memory
> > leak issue. fix it.
> > 
> > The Linux kernel CVE team has assigned CVE-2022-50495 to this issue.
> 
> Please revoke the CVE. This issue can't be triggered by an unprivileged user.

Thanks for the review, now rejected.

greg k-h