Re: CVE-2024-26827: i2c: qcom-geni: Correct I2C TRE sequence

[Greg Kroah-Hartman]

On Thu, Apr 18, 2024 at 02:56:33PM +0200, Jean Delvare wrote:
> Hi Greg,
> 
> On Wed, 2024-04-17 at 11:44 +0200, Greg Kroah-Hartman wrote:
> > Description
> > ===========
> > 
> > In the Linux kernel, the following vulnerability has been resolved:
> > 
> > i2c: qcom-geni: Correct I2C TRE sequence
> > 
> > For i2c read operation in GSI mode, we are getting timeout
> > due to malformed TRE basically incorrect TRE sequence
> > in gpi(drivers/dma/qcom/gpi.c) driver.
> > (...)
> 
> I was assigned the task to backport this security fix to the SUSE
> kernels. However, from the description, I fail to see how this fix
> qualifies as a security fix. I can't find the reason why a CVE was
> assigned to the issue.
> 
> What is the considered attack vector? Or if there is no attack vector,
> what consequence does this bug have, which would put the system
> security at stake?

We reviewed this commit as fitting the fact that timeouts due to
malformed messages would fit into the definition of "vulnerability" in
the CVE world as it would cause a system to incure "negative impact to
confidentiality, integrity, or availability".

If as the i2c maintainer, you don't think this would be the case, we
will be glad to revoke this CVE and just mark it down as a "normal
bugfix".

> From my perspective, all we have here is a functional bug in newly
> introduced code. It's not even a regression.

Regressions are not an issue for CVE assignments :(

thanks,

greg k-h