Re: CVE-2022-50495: x86/xen: Fix memory leak in xen_smp_intr_init{_pv}()

Re: CVE-2022-50495: x86/xen: Fix memory leak in xen_smp_intr_init{_pv}()

[Juergen Gross]

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On 04.10.25 17:51, Greg Kroah-Hartman wrote:
> From: Greg Kroah-Hartman <gregkh@kernel.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.


Juergen

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Re: CVE-2022-50495: x86/xen: Fix memory leak in xen_smp_intr_init{_pv}()

[Greg KH]

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@kernel.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