GSD-2021-1000745 mm, hugetlb: fix simple resv_huge_pages underflow on UFFDIO_COPY
A local attacker can trigger an integer underflow in the hugetlb subsystem via UFFDIO_COPY, potentially causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000745?
GSD-2021-1000745 is a vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mm, hugetlb: fix simple resv_huge_pages underflow on UFFDIO_COPY
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.194 by commit 7de60c2d5a2a66ef2c5d76952a5a3a9a4ea4d436, it was introduced in version v4.11 by commit 8fb5debc5fcd450470cdd789c2d80ef95ebb8cf4. For more details please see the references link.
Which versions are affected by GSD-2021-1000745?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000745?
No fix has been published for GSD-2021-1000745 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000745 being exploited?
There is no known exploitation of GSD-2021-1000745 in the wild and no public exploit code.