CVE-2025-68759 wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring()
A memory leak in the Linux kernel rtl818x Wi-Fi driver allows attackers to cause denial of service by exhausting system memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68759?
CVE-2025-68759 is a memory corruption vulnerability in Linux, published on 5 Jan 2026. 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:
wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring()
In rtl8180_init_rx_ring(), memory is allocated for skb packets and DMA allocations in a loop. When an allocation fails, the previously successful allocations are not freed on exit.
Fix that by jumping to err_free_rings label on error, which calls rtl8180_free_rx_ring() to free the allocations. Remove the free of rx_ring in rtl8180_init_rx_ring() error path, and set the freed priv->rx_buf entry to null, to avoid double free.
Which versions are affected by CVE-2025-68759?
How do I fix CVE-2025-68759?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-68759 being exploited?
There is no known exploitation of CVE-2025-68759 in the wild and no public exploit code.
Sources
Also known as AZL-73406, BELL-CVE-2025-68759, DEBIAN-CVE-2025-68759, GHSA-55hf-cr49-h3r7, ROOT-OS-DEBIAN-11-CVE-2025-68759, ROOT-OS-DEBIAN-12-CVE-2025-68759 and 4 more.