CVE-2026-53338 is a vulnerability in Linux Kernel
Published on July 1, 2026
net: airoha: Add NULL check for of_reserved_mem_lookup() in airoha_qdma_init_hfwd_queues()
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.
Products Associated with CVE-2026-53338
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Affected Versions
Linux:- Version 3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b and below 01f7d4b504580664d36faea5671cde5e3f0d8a5b is affected.
- Version 3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b and below cdb96c42db7b256348f9b57718debfaa4bca6b39 is affected.
- Version 3a1ce9e3d01bbf3912c3e3f81cb554d558eb715b and below f9f25118faa4dd2b6e3d14a03d123bbdbd59925d is affected.
- Version 6.16 is affected.
- Before 6.16 is unaffected.
- Version 6.18.36, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.