ACK: [SRU][F][PATCH 0/1] CVE-2022-48938

[Manuel Diewald]

On Thu, Oct 24, 2024 at 05:06:24PM -0500, Bethany Jamison wrote:
> [Impact]
> 
> A broken device may give an extreme offset like 0xFFF0
> and a reasonable length for a fragment. In the sanity
> check as formulated now, this will create an integer
> overflow, defeating the sanity check. Both offset
> and offset + len need to be checked in such a manner
> that no overflow can occur.
> And those quantities should be unsigned.
> 
> [Fix]
> 
> Noble:	not-affected
> Jammy:	not-affected
> Focal:	Clean cherry-pick from linux-5.10.y
> Bionic:	fix sent to esm ML
> Xenial:	fix sent to esm ML
> Trusty:	won't fix
> 
> [Test Case]
> 
> Compile tested.
> 
> [Where problems could occur]
> 
> This fix affects those who use the Network Control Model (NCM)
> USB host driver, an issue with this fix would be visible to 
> the user via unpredicted system behavior or memory corruption.
> 
> Oliver Neukum (1):
>   CDC-NCM: avoid overflow in sanity checking
> 
>  drivers/net/usb/cdc_ncm.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> -- 
> 2.34.1
> 
> 
> -- 
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team

Acked-by: Manuel Diewald <manuel.diewald at canonical.com>

-- 
 Manuel
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