GSD-2021-1000802 sch_htb: fix refcount leak in htb_parent_to_leaf_offload
A refcount leak in the Linux Kernel HTB scheduler can lead to resource exhaustion and denial of service, requiring local privileged access to exploit.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000802?
GSD-2021-1000802 is a memory corruption 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
sch_htb: fix refcount leak in htb_parent_to_leaf_offload
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 v5.12.10 by commit 2411c02d03892a5057499f8102d0cc1e0f852416, it was introduced in version v5.12 by commit ae81feb7338c89cee4e6aa0424bdab2ce2b52da2. For more details please see the references link.
Which versions are affected by GSD-2021-1000802?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000802?
No fix has been published for GSD-2021-1000802 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2021-1000802 being exploited?
There is no known exploitation of GSD-2021-1000802 in the wild and no public exploit code.