GSD-2022-1004223 tunnels: do not assume mac header is set in skb_tunnel_check_pmtu()
A null pointer dereference in the Linux kernel tunneling code can cause a system crash, requiring an upgrade to the fixed kernel version.
- 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-2022-1004223?
GSD-2022-1004223 is a vulnerability in Kernel, published on 31 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
tunnels: do not assume mac header is set in skb_tunnel_check_pmtu()
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 v5.18.10 by commit 32dcf62efa0003f92a976aea0c57f118e689de8b, it was introduced in version v5.9 by commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f. For more details please see the references link.
Which versions are affected by GSD-2022-1004223?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1004223?
No fix has been published for GSD-2022-1004223 yet. Limit exposure of the affected software until one is available.
Is GSD-2022-1004223 being exploited?
There is no known exploitation of GSD-2022-1004223 in the wild and no public exploit code.