GSD-2021-1001253 bpf: Track subprog poke descriptors correctly and fix use-after-free
A use-after-free vulnerability in the Linux kernel BPF subsystem allows local attackers with high privileges to potentially execute arbitrary code or escalate privileges.
- 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-2021-1001253?
GSD-2021-1001253 is an use after free 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: Track subprog poke descriptors correctly and fix use-after-free
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 v5.10.53 by commit a9f36bf3613c65cb587c70fac655c775d911409b, it was introduced in version v5.10 by commit a748c6975dea325da540610c2ba9b5f332c603e6. For more details please see the references link.
Which versions are affected by GSD-2021-1001253?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001253?
No fix has been published for GSD-2021-1001253 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1001253 being exploited?
There is no known exploitation of GSD-2021-1001253 in the wild and no public exploit code.