CVE-2026-53159

Description

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix DMA address corruption due to find_vma misuse fastrpc_get_args() uses find_vma() to look up the VMA for a user-provided pointer and compute a DMA address offset. When the address falls in a gap before the returned VMA, (ptr & PAGE_MASK) - vma->vm_start underflows, corrupting the DMA address sent to the DSP. Replace find_vma() with vma_lookup(), which returns NULL when the address is not contained within any VMA.

References

• https://git.kernel.org/stable/c/2d0f47e27c1fa718b29c69aa7c96a2c5161bc2c2
• https://git.kernel.org/stable/c/464c6ad2aa16e1e1df9d559289199356493d1e00
• https://git.kernel.org/stable/c/53e06f8a3c2b085c31bf1284e2ebcb8036e99625
• https://git.kernel.org/stable/c/708c17b52c60fe7a57e73b495bdee50f58feb48c
• https://git.kernel.org/stable/c/7ba7b30ddb04646d4d638f4d8c4718a304bbbddd