GSD-2023-1001119 net/tunnel: wait until all sk_user_data reader finish before releasing the sock
A use-after-free vulnerability in the Linux kernel tunnel module allows attackers to potentially execute code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2023-1001119?
GSD-2023-1001119 is an use after free vulnerability in Kernel, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
net/tunnel: wait until all sk_user_data reader finish before releasing the sock
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 v5.15.86 by commit 9a6544343bba7da929d6d4a2dc44ec0f15970081, it was introduced in version v3.18 by commit 6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d. For more details please see the references link.
Which versions are affected by GSD-2023-1001119?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1001119?
No fix has been published for GSD-2023-1001119 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-2023-1001119 being exploited?
There is no known exploitation of GSD-2023-1001119 in the wild and no public exploit code.