GSD-2021-1001879 blk-cgroup: blk_cgroup_bio_start() should use irq-safe operations on blkg->iostat_cpu
A race condition in the Linux kernel block cgroup subsystem can lead to system instability or denial of service due to unsafe interrupt handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001879?
GSD-2021-1001879 is a vulnerability in Kernel, published on 28 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
blk-cgroup: blk_cgroup_bio_start() should use irq-safe operations on blkg->iostat_cpu
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 v5.14.15 by commit b1a34f86b41fd89441fa0e245b6b23627b0d73d3, it was introduced in version v5.13 by commit 2d146aa3aa842d7f5065802556b4f9a2c6e8ef12. For more details please see the references link.
Which versions are affected by GSD-2021-1001879?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001879?
No fix has been published for GSD-2021-1001879 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1001879 being exploited?
There is no known exploitation of GSD-2021-1001879 in the wild and no public exploit code.