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CVE-2026-53159: misc: fastrpc: fix DMA address corruption due to find_vma misuse

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-07-18

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.

Affected products

• Linux kernel: from 5.1.6 before 5.10.260; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36 — fixed in 5.10.260, 5.15.210, 6.1.176, 6.12.94, 6.18.36, 6.6.143

How to fix

Upgrade to a fixed version: Linux kernel 5.10.260, 5.15.210, 6.1.176, 6.12.94. Check the vendor advisory for mitigations.

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
• https://git.kernel.org/stable/c/d3e26df2e8eb361e6bef096b2fd565476a1f14c4
• https://git.kernel.org/stable/c/d43afc412d439ffca1567e7ca8652be22f272b3b
• https://git.kernel.org/stable/c/e69e306a4cccb40a73511350cb280825a556ce3c

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