What’s Vulnerable › Vulnerabilities

CVE-2022-49323: iommu/arm-smmu: fix possible null-ptr-deref in arm_smmu_device_probe()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu: fix possible null-ptr-deref in arm_smmu_device_probe() It will cause null-ptr-deref when using 'res', if platform_get_resource() returns NULL, so move using 'res' after devm_ioremap_resource() that will check it to avoid null-ptr-deref. And use devm_platform_get_and_ioremap_resource() to simplify code.

Affected products

• Linux kernel: before 5.10.122; from 5.11 before 5.15.47; from 5.16 before 5.17.15; from 5.18 before 5.18.4 — fixed in 5.10.122, 5.15.47, 5.17.15, 5.18.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.122, 5.15.47, 5.17.15, 5.18.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3660db29b0305f9a1d95979c7af0f5db6ea99f5d
• https://git.kernel.org/stable/c/449fc4561762ad9ad85362d5f01f0d0df397457a
• https://git.kernel.org/stable/c/80776a71340f57d6a4952635fc89f0342072f3ca
• https://git.kernel.org/stable/c/98dd53a92825747395649f54d23512a13c3ed471
• https://git.kernel.org/stable/c/d9ed8af1dee37f181096631fb03729ece98ba816

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