GSD-2021-1000127 bpf: Fix masking negation logic upon negative dst register
A logic error in the Linux kernel BPF verifier allows local attackers to potentially escalate privileges or execute code via crafted BPF programs.
- 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-2021-1000127?
GSD-2021-1000127 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: Fix masking negation logic upon negative dst register
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 v5.11.19 by commit 6eba92a4d4be8feb4dc33976abac544fa99d6ecc, it was introduced in version v5.0 by commit 979d63d50c0c0f7bc537bf821e056cc9fe5abd38. For more details please see the references link.
Which versions are affected by GSD-2021-1000127?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000127?
No fix has been published for GSD-2021-1000127 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000127 being exploited?
There is no known exploitation of GSD-2021-1000127 in the wild and no public exploit code.