ACK: [SRU][N][PATCH 0/1] CVE-2025-21729

[Alessio Faina]

On Tue, Oct 07, 2025 at 04:55:51PM -0400, Alice C. Munduruca wrote:
> [ Impact ]
> 
> A Use After Free bug is possible in `rtw89`, as the check for whether the
> device is scanning can race with scan completion, leading to the attribute
> `hw_scan_req` being freed as the scan completes and before it is accessed
> in the function `rtw89_ops_cancel_hw_scan`. As such, protect this code path
> with a mutex so that a race cannot occur.
> 
> [ Fix ]
> 
> noble: backported from upstream patch --
>        added label `out` and applied, removing the dependence on upstream context.
> 
> [ Tests ]
> 
> Compile and boot tested.
> 
> [ Where problems could occur ]
> 
> Given that the change consists of protecting a check with an already existing
> mutex, there is little risk of regressions.
> 
> Ping-Ke Shih (1):
>   wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
> 
>  drivers/net/wireless/realtek/rtw89/mac80211.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> -- 
> 2.51.0
> 
> 
> -- 
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> kernel-team at lists.ubuntu.com
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Acked-by: Alessio Faina <alessio.faina at canonical.com>