CVE-2025-39739

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu-qcom: Add SM6115 MDSS compatible

Add the SM6115 MDSS compatible to clients compatible list, as it also

needs that workaround.

Without this workaround, for example, QRB4210 RB2 which is based on

SM4250/SM6115 generates a lot of smmu unhandled context faults during

boot:

arm_smmu_context_fault: 116854 callbacks suppressed

arm-smmu c600000.iommu: Unhandled context fault: fsr=0x402,

iova=0x5c0ec600, fsynr=0x320021, cbfrsynra=0x420, cb=5

arm-smmu c600000.iommu: FSR = 00000402 [Format=2 TF], SID=0x420

arm-smmu c600000.iommu: FSYNR0 = 00320021 [S1CBNDX=50 PNU PLVL=1]

arm-smmu c600000.iommu: Unhandled context fault: fsr=0x402,

iova=0x5c0d7800, fsynr=0x320021, cbfrsynra=0x420, cb=5

arm-smmu c600000.iommu: FSR = 00000402 [Format=2 TF], SID=0x420

and also failed initialisation of lontium lt9611uxc, gpu and dpu is

observed:

(binding MDSS components triggered by lt9611uxc have failed)

------------[ cut he

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References