CVE-2024-41044 ppp: reject claimed-as-LCP but actually malformed packets
A flaw in the Linux kernel PPP module allows attackers to cause a denial of service by sending malformed LCP packets that bypass validation checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-41044?
CVE-2024-41044 is a medium-severity denial of service vulnerability in Linux kernel, published on 29 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ppp: reject claimed-as-LCP but actually malformed packets
Since 'ppp_async_encode()' assumes valid LCP packets (with code from 1 to 7 inclusive), add 'ppp_check_packet()' to ensure that LCP packet has an actual body beyond PPP_LCP header bytes, and reject claimed-as-LCP but actually malformed data otherwise.
Which versions are affected by CVE-2024-41044?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-41044?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-41044 being exploited?
There is no known exploitation of CVE-2024-41044 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-41044, DEBIAN-CVE-2024-41044, GHSA-f8pw-vxv3-v5xv, UBUNTU-CVE-2024-41044.