CVE-2026-53159

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When the address falls in a gap\nbefore the returned VMA, (ptr & PAGE_MASK) - vma->vm_start underflows,\ncorrupting the DMA address sent to the DSP.\n\nReplace find_vma() with vma_lookup(), which returns NULL when the address\nis not contained within any VMA."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is reached through local FastRPC misc-device ioctls, especially FASTRPC_IOCTL_INVOKE, not through network packets or adjacent/physical input.\nAC:L - The attacker controls the invoke arguments, DMA-buf fd, length, and user address layout; placing the pointer in a VMA gap is straightforward with mmap/munmap and no race is required.\nPR:L - A caller needs local access to an openable /dev/fastrpc-* device, but the kernel path has no capable() check and FastRPC supports untrusted/unsigned user protection domains on relevant Qualcomm DSP deployments.\nUI:N - The attacker triggers the ioctl path directly and does not need another user to open files, mount anything, or perform an action.\nS:C - The corrupted address is consumed across the host/DSP DMA/IOMMU boundary, so the bug can affect memory resources outside the caller\u2019s intended FastRPC buffer authority.\nC:H - The underflow can make an attacker-controlled DSP invocation read from unintended DMA/IOMMU-visible memory rather than the supplied buffer, which is a plausible high-impact information disclosure primitive.\nI:H - For output or bidirectional buffers, the same corrupted DMA address can direct DSP writes to unintended DMA/IOMMU-visible memory, giving a plausible high-impact memory corruption primitive.\nA:H - Invalid or unintended DMA addresses can trigger IOMMU/DSP faults, hangs, or kernel-facing subsystem failure, producing high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": 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When the address falls in a gap\nbefore the returned VMA, (ptr & PAGE_MASK) - vma->vm_start underflows,\ncorrupting the DMA address sent to the DSP.\n\nReplace find_vma() with vma_lookup(), which returns NULL when the address\nis not contained within any VMA."}], "id": "CVE-2026-53159", "lastModified": "2026-07-18T08:16:35.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-25T09:16:33.267", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d0f47e27c1fa718b29c69aa7c96a2c5161bc2c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/464c6ad2aa16e1e1df9d559289199356493d1e00"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53e06f8a3c2b085c31bf1284e2ebcb8036e99625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/708c17b52c60fe7a57e73b495bdee50f58feb48c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7ba7b30ddb04646d4d638f4d8c4718a304bbbddd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3e26df2e8eb361e6bef096b2fd565476a1f14c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d43afc412d439ffca1567e7ca8652be22f272b3b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e69e306a4cccb40a73511350cb280825a556ce3c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: misc: fastrpc: fix DMA address corruption due to find_vma misuse", "id": "2492706", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492706"}, "csaw": false, "cwe": "CWE-191", "details": ["A flaw was found in the Linux kernel's fastrpc module. The `fastrpc_get_args()` function incorrectly calculates a Direct Memory Access (DMA) address offset for user-provided pointers. This can lead to an underflow, corrupting the DMA address sent to the Digital Signal Processor (DSP). This corruption could result in system instability or other undefined behavior."], "name": "CVE-2026-53159", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53159\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53159\nhttps://lore.kernel.org/linux-cve-announce/2026062549-CVE-2026-53159-d6fc@gregkh/T"]}

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