CVE-2020-12655 Denial of service in n/a
Attackers can cause a denial of service by triggering excessive sync durations via crafted XFS v5 metadata in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-12655?
CVE-2020-12655 is a medium-severity denial of service vulnerability in Linux kernel, published on 5 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in xfs_agf_verify in fs/xfs/libxfs/xfs_alloc.c in the Linux kernel through 5.6.10. Attackers may trigger a sync of excessive duration via an XFS v5 image with crafted metadata, aka CID-d0c7feaf8767.
Weakness: CWE-835
Which versions are affected by CVE-2020-12655?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2020-12655?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-12655 being exploited?
There is no known exploitation of CVE-2020-12655 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2020-12655, GHSA-6694-j64w-gpfc, UBUNTU-CVE-2020-12655.