[PATCH 0/1] [SRU] [focal/linux-oem-5.6] CVE-2020-25285

Colin Ian King colin.king at canonical.com
Fri Mar 12 18:07:52 UTC 2021


On 12/03/2021 17:59, Tim Gardner wrote:
> [Impact]
> A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux
> kernel before 5.8.8 could be used by local attackers to corrupt memory, cause
> a NULL pointer dereference, or possibly have unspecified other impact, aka
> CID-17743798d812.
> 
> From the Ubuntu security team:
> It was discovered that a race condition existed in the hugetlb sysctl
> implementation in the Linux kernel. A privileged attacker could use this to
> cause a denial of service (system crash).
> 
> [Test Plan]
> none
> 
> [Where problems could occur]
> Released in 
> linux-4.14.y
> linux-4.19.y
> linux-4.4.y
> linux-4.9.y
> linux-5.4.y
> linux-5.8.y
> 
> 

Looks fine to me. Thanks Tim.

Acked-by: Colin Ian King <colin.king at canonical.com>



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