ACK: [SRU][M][PATCH 0/1] CVE-2024-25739

[Philip Cox]

On Fri, 2024-06-07 at 14:41 -0500, Bethany Jamison wrote:
> [Impact]
> 
> ubi: Check for too small LEB size in VTBL code
> 
> If the LEB size is smaller than a volume table record we cannot
> have volumes.
> In this case abort attaching.
> 
> create_empty_lvol in drivers/mtd/ubi/vtbl.c in the Linux kernel
> through
> 6.7.4 can attempt to allocate zero bytes, and crash, because of a
> missing
> check for ubi->leb_size.
> 
> [Fix]
> 
> Noble:  pending
> Mantic: Clean cherry-pick from linux-6.6.y
> Jammy:  pending
> Focal:  fixed via stable
> Bionic: fix sent to esm ML
> Xenial: fix sent to esm ML
> Trusty: not going to be fixed by us
> 
> [Test Case]
> 
> Compile and boot tested
> 
> [Where problems could occur]
> 
> This fix affects those who use the UBI volume table (vtbl),
> an issue with this fix would be visible to the user via a
> system crash.
> 
> Richard Weinberger (1):
>   ubi: Check for too small LEB size in VTBL code
> 
>  drivers/mtd/ubi/vtbl.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> -- 
> 2.34.1
> 
> 

-- 
Acked-by: Philip Cox <philip.cox at canonical.com>

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