GSD-2021-1001442 seq_file: disallow extremely large seq buffer allocations
A local attacker can trigger excessive memory allocation in the seq_file subsystem, 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-2021-1001442?
GSD-2021-1001442 is a denial of service vulnerability in Kernel, published on 3 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
seq_file: disallow extremely large seq buffer allocations
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 v4.9.276 by commit c5157b3e775dac31d51b11f993a06a84dc11fc8c, it was introduced in version v3.16 by commit 058504edd02667eef8fac9be27ab3ea74332e9b4. For more details please see the references link.
Which versions are affected by GSD-2021-1001442?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001442?
No fix has been published for GSD-2021-1001442 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2021-1001442 being exploited?
There is no known exploitation of GSD-2021-1001442 in the wild and no public exploit code.