GSD-2021-1000021 bpf: Use correct permission flag for mixed signed bounds arithmetic
A flaw in the Linux kernel BPF subsystem allows local attackers to potentially escalate privileges due to incorrect permission checks in mixed signed bounds arithmetic.
- 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-2021-1000021?
GSD-2021-1000021 is a vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
bpf: Use correct permission flag for mixed signed bounds arithmetic
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 v5.10.32 by commit 4f3ff11204eac0ee23acf64deecb3bad7b0db0c6, it was introduced in version v5.8 by commit 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366. For more details please see the references link.
Which versions are affected by GSD-2021-1000021?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000021?
No fix has been published for GSD-2021-1000021 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000021 being exploited?
There is no known exploitation of GSD-2021-1000021 in the wild and no public exploit code.