CVE-2025-37757 tipc: fix memory leak in tipc_link_xmit
A memory leak in the Linux kernel's TIPC module can cause resource exhaustion and denial of service when the backlog queue is overloaded.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-37757?
CVE-2025-37757 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 1 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix memory leak in tipc_link_xmit
In case the backlog transmit queue for system-importance messages is overloaded, tipc_link_xmit() returns -ENOBUFS but the skb list is not purged. This leads to memory leak and failure when a skb is allocated.
This commit fixes this issue by purging the skb list before tipc_link_xmit() returns.
Weakness: CWE-401
Which versions are affected by CVE-2025-37757?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37757?
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-2025-37757 being exploited?
There is no known exploitation of CVE-2025-37757 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37757, DEBIAN-CVE-2025-37757, GHSA-p267-6p34-qmhj, ROOT-OS-DEBIAN-12-CVE-2025-37757, ROOT-OS-UBUNTU-2204-CVE-2025-37757, ROOT-OS-UBUNTU-2404-CVE-2025-37757 and 1 more.