GSD-2023-1000745 bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
A use-after-free vulnerability in the Linux kernel sockmap allows local attackers to cause denial of service or potentially escalate privileges.
- 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-2023-1000745?
GSD-2023-1000745 is an use after free vulnerability in Kernel, published on 17 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
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 v6.0.16 by commit 578a7628b838a3ac8ad61deaab5a816ff032ac13, it was introduced in version v5.15 by commit cd9733f5d75c94a32544d6ce5be47e14194cf137. For more details please see the references link.
Which versions are affected by GSD-2023-1000745?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1000745?
No fix has been published for GSD-2023-1000745 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-2023-1000745 being exploited?
There is no known exploitation of GSD-2023-1000745 in the wild and no public exploit code.