ACK: [PATCH 0/1] [SRU] [focal/linux-oem-5.6] CVE-2020-28941

[Stefan Bader]

On 11.03.21 20:35, Tim Gardner wrote:
> [Impact]
> An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the
> Linux kernel through 5.9.9. Local attackers on systems with the speakup driver
> could cause a local denial of service attack, aka CID-d41227544427. This
> occurs because of an invalid free when the line discipline is used more than once.
> 
>  From the Ubuntu security team:
> Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the
> Linux kernel did not correctly handle setting line discipline in some situations.
> A local attacker could use this to cause a denial of service (system crash).
> 
> [Test Case]
> none
> 
> [Potential regression]
> Patch released in
> linux-4.14.y
> linux-4.19.y
> linux-5.4.y
> linux-5.9.y
> 
> 
Acked-by: Stefan Bader <stefan.bader at canonical.com>

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