GSD-2021-1001158 bpf: Fix tail_call_reachable rejection for interpreter when jit failed
A flaw in the Linux Kernel BPF subsystem could cause a denial of service when JIT compilation fails, requiring local access to exploit.
- 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-2021-1001158?
GSD-2021-1001158 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
bpf: Fix tail_call_reachable rejection for interpreter when jit failed
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 v5.13.6 by commit cbb086074dab631ac43f8645cbac1d7b148e05c4, it was introduced in version v5.10 by commit ebf7d1f508a73871acf3b2bfbfa1323a477acdb3. For more details please see the references link.
Which versions are affected by GSD-2021-1001158?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001158?
No fix has been published for GSD-2021-1001158 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-2021-1001158 being exploited?
There is no known exploitation of GSD-2021-1001158 in the wild and no public exploit code.