CVE-2024-38545 RDMA/hns: Fix UAF for cq async event
A race condition in the Linux kernel RDMA driver allows attackers to trigger a use-after-free, potentially leading to code execution or privilege escalation.
- 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-2024-38545?
CVE-2024-38545 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 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:
RDMA/hns: Fix UAF for cq async event
The refcount of CQ is not protected by locks. When CQ asynchronous events and CQ destruction are concurrent, CQ may have been released, which will cause UAF.
Use the xa_lock() to protect the CQ refcount.
Weakness: CWE-416
Which versions are affected by CVE-2024-38545?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-38545?
Apply the vendor's patch.
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 CVE-2024-38545 being exploited?
There is no known exploitation of CVE-2024-38545 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-48222, BELL-CVE-2024-38545, DEBIAN-CVE-2024-38545, GHSA-w738-qp3q-hrfg, ROOT-OS-DEBIAN-11-CVE-2024-38545, UBUNTU-CVE-2024-38545.