CVE-2026-53338 net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues()
A missing NULL check in the Airoha QDMA driver can cause a kernel crash if the device tree is misconfigured, leading to denial of service.
- 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-2026-53338?
CVE-2026-53338 is a medium-severity vulnerability in Linux kernel, published on 1 Jul 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:
net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues()
of_reserved_mem_lookup() may return NULL if the reserved memory region referenced by the "memory-region" phandle is not found in the reserved memory table (e.g. due to a misconfigured DTS or a removed memory-region node). The current code dereferences the returned pointer without checking for NULL, leading to a kernel NULL pointer dereference at the following lines:
dma_addr = rmem->base; // line 1156 num_desc = div_u64(rmem->size, buf_size); // line 1160
Add a NULL check after of_reserved_mem_lookup() and return -ENODEV if the lookup fails, which is consistent with the existing error handling for of_parse_phandle() failure in the same code block.
Weakness: CWE-476
Which versions are affected by CVE-2026-53338?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53338?
Apply the vendor's patch.
Is CVE-2026-53338 being exploited?
There is no known exploitation of CVE-2026-53338 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53338, DEBIAN-CVE-2026-53338, GHSA-fxch-pwp2-83j7, UBUNTU-CVE-2026-53338.